原生态纯JavaScript 100大技巧大收集---你值得拥有
1、原生JavaScript实现字符串长度截取
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function
cutstr(str, len) {
var
temp;
var
icount = 0;
var
patrn = /[^\x00-\xff]/;
var
strre =
""
;
for
(
var
i = 0; i < str.length; i++) {
if
(icount < len - 1) {
temp = str.substr(i, 1);
if
(patrn.exec(temp) ==
null
) {
icount = icount + 1
}
else
{
icount = icount + 2
}
strre += temp
}
else
{
break
}
}
return
strre +
"..."
}
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2、原生JavaScript获取域名主机
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function
getHost(url) {
var
host =
"null"
;
if
(
typeof
url ==
"undefined"
||
null
== url) {
url = window.location.href;
}
var
regex = /^\w+\:\/\/([^\/]*).*/;
var
match = url.match(regex);
if
(
typeof
match !=
"undefined"
&&
null
!= match) {
host = match[1];
}
return
host;
}
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3、原生JavaScript清除空格
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String.prototype.trim =
function
() {
var
reExtraSpace = /^\s*(.*?)\s+$/;
return
this
.replace(reExtraSpace,
"$1"
)
}
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4、原生JavaScript替换全部
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String.prototype.replaceAll =
function
(s1, s2) {
return
this
.replace(
new
RegExp(s1,
"gm"
), s2)
}
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5、原生JavaScript转义html标签
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function
HtmlEncode(text) {
return
text.replace(/&/g,
'&'
).replace(/\
"/g, '"
').replace(/</g,
'<'
).replace(/>/g,
'>'
)
}
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6、原生JavaScript还原html标签
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function
HtmlDecode(text) {
return
text.replace(/&/g,
'&'
).replace(/"/g,
'\"'
).replace(/</g,
'<'
).replace(/>/g,
'>'
)
}
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7、原生JavaScript时间日期格式转换
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Date.prototype.Format =
function
(formatStr) {
var
str = formatStr;
var
Week = [
'日'
,
'一'
,
'二'
,
'三'
,
'四'
,
'五'
,
'六'
];
str = str.replace(/yyyy|YYYY/,
this
.getFullYear());
str = str.replace(/yy|YY/, (
this
.getYear() % 100) > 9 ? (
this
.getYear() % 100).toString() :
'0'
+ (
this
.getYear() % 100));
str = str.replace(/MM/, (
this
.getMonth() + 1) > 9 ? (
this
.getMonth() + 1).toString() :
'0'
+ (
this
.getMonth() + 1));
str = str.replace(/M/g, (
this
.getMonth() + 1));
str = str.replace(/w|W/g, Week[
this
.getDay()]);
str = str.replace(/dd|DD/,
this
.getDate() > 9 ?
this
.getDate().toString() :
'0'
+
this
.getDate());
str = str.replace(/d|D/g,
this
.getDate());
str = str.replace(/hh|HH/,
this
.getHours() > 9 ?
this
.getHours().toString() :
'0'
+
this
.getHours());
str = str.replace(/h|H/g,
this
.getHours());
str = str.replace(/mm/,
this
.getMinutes() > 9 ?
this
.getMinutes().toString() :
'0'
+
this
.getMinutes());
str = str.replace(/m/g,
this
.getMinutes());
str = str.replace(/ss|SS/,
this
.getSeconds() > 9 ?
this
.getSeconds().toString() :
'0'
+
this
.getSeconds());
str = str.replace(/s|S/g,
this
.getSeconds());
return
str
}
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8、原生JavaScript判断是否为数字类型
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function
isDigit(value) {
var
patrn = /^[0-9]*$/;
if
(patrn.exec(value) ==
null
|| value ==
""
) {
return
false
}
else
{
return
true
}
}
|
9、原生JavaScript设置cookie值
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function
setCookie(name, value, Hours) {
var
d =
new
Date();
var
offset = 8;
var
utc = d.getTime() + (d.getTimezoneOffset() * 60000);
var
nd = utc + (3600000 * offset);
var
exp =
new
Date(nd);
exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
document.cookie = name +
"="
+ escape(value) +
";path=/;expires="
+ exp.toGMTString() +
";domain=360doc.com;"
}
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10、原生JavaScript获取cookie值
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function
getCookie(name) {
var
arr = document.cookie.match(
new
RegExp(
"(^| )"
+ name +
"=([^;]*)(;|$)"
));
if
(arr !=
null
)
return
unescape(arr[2]);
return
null
}
|
11、原生JavaScript加入收藏夹
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function
AddFavorite(sURL, sTitle) {
try
{
window.external.addFavorite(sURL, sTitle)
}
catch
(e) {
try
{
window.sidebar.addPanel(sTitle, sURL,
""
)
}
catch
(e) {
alert(
"加入收藏失败,请使用Ctrl+D进行添加"
)
}
}
}
|
12、原生JavaScript设为首页
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function
setHomepage() {
if
(document.all) {
document.body.style.behavior =
'url(#default#homepage)'
;
document.body.setHomePage(
'http://www.jq-school.com'
)
}
else
if
(window.sidebar) {
if
(window.netscape) {
try
{
netscape.security.PrivilegeManager.enablePrivilege(
"UniversalXPConnect"
)
}
catch
(e) {
alert(
"该操作被浏览器拒绝,如果想启用该功能,请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true"
)
}
}
var
prefs = Components.classes[
'@mozilla.org/preferences-service;1'
].getService(Components.interfaces.nsIPrefBranch);
prefs.setCharPref(
'browser.startup.homepage'
,
'http://www.jq-school.com'
)
}
}
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13、原生JavaScript判断IE6
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var
ua = navigator.userAgent.toLowerCase();
var
isIE6 = ua.indexOf(
"msie 6"
) > -1;
if
(isIE6) {
try
{
document.execCommand(
"BackgroundImageCache"
,
false
,
true
)
}
catch
(e) {}
}
|
14、原生JavaScript加载样式文件
function LoadStyle(url) { try { document.createStyleSheet(url) } catch(e) { var cssLink = document.createElement('link'); cssLink.rel = 'stylesheet'; cssLink.type = 'text/css'; cssLink.href = url; var head = document.getElementsByTagName('head')[0]; head.appendChild(cssLink) } }
15、原生JavaScript返回脚本内容
function evalscript(s) { if(s.indexOf('<script') == -1) return s; var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig; var arr = []; while(arr = p.exec(s)) { var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i; var arr1 = []; arr1 = p1.exec(arr[0]); if(arr1) { appendscript(arr1[1], '', arr1[2], arr1[3]); } else { p1 = /<script(.*?)>([^\x00]+?)<\/script>/i; arr1 = p1.exec(arr[0]); appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1); } } return s; }
16、原生JavaScript清除脚本内容
function stripscript(s) { return s.replace(/<script.*?>.*?<\/script>/ig, ''); }
17、原生JavaScript动态加载脚本文件
function appendscript(src, text, reload, charset) { var id = hash(src + text); if(!reload && in_array(id, evalscripts)) return; if(reload && $(id)) { $(id).parentNode.removeChild($(id)); } evalscripts.push(id); var scriptNode = document.createElement("script"); scriptNode.type = "text/javascript"; scriptNode.id = id; scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset); try { if(src) { scriptNode.src = src; scriptNode. = false; scriptNode.onload = function () { scriptNode. = true; JSLOADED[src] = 1; }; scriptNode.onreadystatechange = function () { if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode. { scriptNode. = true; JSLOADED[src] = 1; } }; } else if(text){ scriptNode.text = text; } document.getElementsByTagName('head')[0].appendChild(scriptNode); } catch(e) {} }
18、原生JavaScript返回按ID检索的元素对象
function $(id) { return !id ? null : document.getElementById(id); }
19、原生JavaScript返回浏览器版本内容
function browserVersion(types) { var other = 1; for(i in types) { var v = types[i] ? types[i] : i; if(USERAGENT.indexOf(v) != -1) { var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[2] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; }else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other; }
20、原生JavaScript元素显示的通用方法
function $(id) { return !id ? null : document.getElementById(id); } function display(id) { var obj = $(id); if(obj.style.visibility) { obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible'; } else { obj.style.display = obj.style.display == '' ? 'none' : ''; } }
21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
function insertAfter(newChild,refChild){ var parElem=refChild.parentNode; if(parElem.lastChild==refChild){ refChild.appendChild(newChild); }else{ parElem.insertBefore(newChild,refChild.nextSibling); } }
22、原生JavaScript中兼容浏览器绑定元素事件
function addEventSamp(obj,evt,fn){ if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent('on'+evt,fn); } }
23、原生JavaScript光标停在文字的后面,文本框获得焦点时调用
function focusLast(){ var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse(true); r.select(); }
24、原生JavaScript检验URL链接是否有效
function getUrlState(URL){ var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL, false); try{ xmlhttp.Send(); }catch(e){ }finally{ var result = xmlhttp.responseText; if(result){ if(xmlhttp.Status==200){ return(true); }else{ return(false); } }else{ return(false); } } }
25、原生JavaScript格式化CSS样式代码
function formatCss(s){//格式化代码 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); s = s.replace(/;\s*;/g, ";"); //清除连续分号 s = s.replace(/\,[\s\.\#\d]*{/g, "{"); s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2"); s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2"); s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2"); return s; }
26、原生JavaScript压缩CSS样式代码
function yasuoCss (s) {//压缩代码 s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理 s = s.replace(/;\s*;/g, ";"); //清除连续分号 s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白 return (s == null) ? "" : s[1]; }
27、原生JavaScript获取当前路径
var currentPageUrl = ""; if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase(); } else { currentPageUrl = this.href.toString().toLowerCase(); }
28、原生JavaScriptIP转成整型
function _ip2int(ip){ var num = 0; ip = ip.split("."); num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]); num = num >>> 0; return num; }
29、原生JavaScript整型解析为IP地址
function _int2iP(num){ var str; var tt = new Array(); tt[0] = (num >>> 24) >>> 0; tt[1] = ((num << 8) >>> 24) >>> 0; tt[2] = (num << 16) >>> 24; tt[3] = (num << 24) >>> 24; str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]); return str; }
30、原生JavaScript实现checkbox全选与全不选
function checkAll() { var selectall = document.getElementById("selectall"); var allbox = document.getElementsByName("allbox"); if (selectall.checked) { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = true; } } else { for (var i = 0; i < allbox.length; i++) { allbox[i].checked = false; } } }
(31~40)移动篇
31、原生JavaScript判断是否移动设备
function isMobile(){ if (typeof this._isMobile === 'boolean'){ return this._isMobile; } var screenWidth = this.getScreenWidth(); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(!fixViewPortsExperiment){ if(!this.isAppleMobileDevice()){ screenWidth = screenWidth/window.devicePixelRatio; } } var isMobileScreenSize = screenWidth < 600; var isMobileUserAgent = false; this._isMobile = isMobileScreenSize && this.isTouchScreen(); return this._isMobile; }
32、原生JavaScript判断是否移动设备访问
function isMobileUserAgent(){ return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase())); }
33、原生JavaScript判断是否苹果移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase())); }
34、原生JavaScript判断是否安卓移动设备访问
function isAndroidMobileDevice(){ return (/android/i.test(navigator.userAgent.toLowerCase())); }
35、原生JavaScript判断是否Touch屏幕
function isTouchScreen(){ return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch); }
36、原生JavaScript判断是否在安卓上的谷歌浏览器
function isNewChromeOnAndroid(){ if(this.isAndroidMobileDevice()){ var userAgent = navigator.userAgent.toLowerCase(); if((/chrome/i.test(userAgent))){ var parts = userAgent.split('chrome/'); var fullVersionString = parts[1].split(" ")[0]; var versionString = fullVersionString.split('.')[0]; var version = parseInt(versionString); if(version >= 27){ return true; } } } return false; }
37、原生JavaScript判断是否打开视窗
function isViewportOpen() { return !!document.getElementById('wixMobileViewport'); }
38、原生JavaScript获取移动设备初始化大小
function getInitZoom(){ if(!this._initZoom){ var screenWidth = Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } this._initZoom = screenWidth /document.body.offsetWidth; } return this._initZoom; }
39、原生JavaScript获取移动设备最大化大小
function getZoom(){ var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new"); if(FixViewPortsExperimentRunning){ return screenWidth / window.innerWidth; }else{ return screenWidth / document.body.offsetWidth; } }
40、原生JavaScript获取移动设备屏幕宽度
function getScreenWidth(){ var smallerSide = Math.min(screen.width, screen.height); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(fixViewPortsExperiment){ if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ smallerSide = smallerSide/window.devicePixelRatio; } } return smallerSide; }
41、原生JavaScript完美判断是否为网址
function IsURL(strUrl) { var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i if (regular.test(strUrl)) { return true; } else { return false; } }
42、原生JavaScript根据样式名称检索元素对象
function getElementsByClassName(name) { var tags = document.getElementsByTagName('*') || document.all; var els = []; for (var i = 0; i < tags.length; i++) { if (tags[i].className) { var cs = tags[i].className.split(' '); for (var j = 0; j < cs.length; j++) { if (name == cs[j]) { els.push(tags[i]); break } } } } return els }
43、原生JavaScript判断是否以某个字符串开头
String.prototype.startWith = function (s) { return this.indexOf(s) == 0 }
44、原生JavaScript判断是否以某个字符串结束
String.prototype.endWith = function (s) { var d = this.length - s.length; return (d >= 0 && this.lastIndexOf(s) == d) }
45、原生JavaScript返回IE浏览器的版本号
function getIE(){ if (window.ActiveXObject){ var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1]; return parseFloat(v.substring(0, v.indexOf("."))) } return false }
46、原生JavaScript获取页面高度
function getPageHeight(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight); }
47、原生JavaScript获取页面scrollLeft
function getPageScrollLeft(){ var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft; }
48、原生JavaScript获取页面可视宽度
function getPageViewWidth(){ var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth; }
49、原生JavaScript获取页面宽度
function getPageWidth(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth); }
50、原生JavaScript获取页面scrollTop
function getPageScrollTop(){ var a = document; return a.documentElement.scrollTop || a.body.scrollTop; }
51、原生JavaScript获取页面可视高度
56、原生JavaScript全角半角转换,iCase: 0全到半,1半到全,其他不转化
58、原生JavaScript获取网页被卷去的位置
61、原生JavaScript解决offsetX兼容性问题
// 针对火狐不支持offsetX/Y function getOffset(e){ var target = e.target, // 当前触发的目标对象 eventCoord, pageCoord, offsetCoord; // 计算当前触发元素到文档的距离 pageCoord = getPageCoord(target); // 计算光标到文档的距离 eventCoord = { X : window.pageXOffset + e.clientX, Y : window.pageYOffset + e.clientY }; // 相减获取光标到第一个定位的父元素的坐标 offsetCoord = { X : eventCoord.X - pageCoord.X, Y : eventCoord.Y - pageCoord.Y }; return offsetCoord; } function getPageCoord(element){ var coord = { X : 0, Y : 0 }; // 计算从当前触发元素到根节点为止, // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和 while (element){ coord.X += element.offsetLeft; coord.Y += element.offsetTop; element = element.offsetParent; } return coord; }
62、原生JavaScript常用的正则表达式
//正整数 /^[0-9]*[1-9][0-9]*$/; //负整数 /^-[0-9]*[1-9][0-9]*$/; //正浮点数 /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/; //负浮点数 /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //浮点数 /^(-?\d+)(\.\d+)?$/; //email地址 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; //url地址 /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/; //年/月/日(年-月-日、年.月.日) /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/; //匹配中文字符 /[\u4e00-\u9fa5]/; //匹配帐号是否合法(字母开头,允许5-10字节,允许字母数字下划线) /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/; //匹配空白行的正则表达式 /\n\s*\r/; //匹配中国邮政编码 /[1-9]\d{5}(?!\d)/; //匹配身份证 /\d{15}|\d{18}/; //匹配国内电话号码 /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/; //匹配IP地址 /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/; //匹配首尾空白字符的正则表达式 /^\s*|\s*$/; //匹配HTML标记的正则表达式 < (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript实现返回顶部的通用方法
function backTop(btnId) { var btn = document.getElementById(btnId); var d = document.documentElement; var b = document.body; window.onscroll = set; btn.style.display = "none"; btn.onclick = function() { btn.style.display = "none"; window.onscroll = null; this.timer = setInterval(function() { d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set); }, 10); }; function set() { btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none" } }; backTop('goTop');
64、原生JavaScript获得URL中GET参数值
// 用法:如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得:GET["t1"], GET["t2"], GET["t3"] function get_get(){ querystr = window.location.href.split("?") if(querystr[1]){ GETs = querystr[1].split("&") GET =new Array() for(i=0;i<GETs.length;i++){ tmp_arr = GETs[i].split("=") key=tmp_arr[0] GET[key] = tmp_arr[1] } } return querystr[1]; }
65、原生JavaScript实现全选通用方法
function checkall(form, prefix, checkall) { var checkall = checkall ? checkall : 'chkall'; for(var i = 0; i < form.elements.length; i++) { var e = form.elements[i]; if(e.type=="checkbox"){ e.checked = form.elements[checkall].checked; } } }
66、原生JavaScript实现全部取消选择通用方法
function uncheckAll(form) { for (var i=0;i<form.elements.length;i++){ var e = form.elements[i]; if (e.name != 'chkall') e.checked=!e.checked; } }
67、原生JavaScript实现打开一个窗体通用方法
function openWindow(url,windowName,width,height){ var x = parseInt(screen.width / 2.0) - (width / 2.0); var y = parseInt(screen.height / 2.0) - (height / 2.0); var isMSIE= (navigator.appName == "Microsoft Internet Explorer"); if (isMSIE) { var p = "resizable=1,location=no,scrollbars=no,width="; p = p+width; p = p+",height="; p = p+height; p = p+",left="; p = p+x; p = p+",top="; p = p+y; retval = window.open(url, windowName, p); } else { var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" ); eval("try { win.resizeTo(width, height); } catch(e) { }"); win.focus(); } }
68、原生JavaScript判断是否为客户端设备
function client(o){ var b = navigator.userAgent.toLowerCase(); var t = false; if (o == 'isOP'){ t = b.indexOf('opera') > -1; } if (o == 'isIE'){ t = b.indexOf('msie') > -1; } if (o == 'isFF'){ t = b.indexOf('firefox') > -1; } return t; }
69、原生JavaScript获取单选按钮的值
function get_radio_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked){ return field[i].value; } } }else { return ; } }
70、原生JavaScript获取复选框的值
function get_checkbox_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field[i].checked && !field[i].disabled){ return field[i].value; } } }else { return; } }
(71~80)验证篇这一篇文章主要是10个比较常用表单验证功能,包括了邮箱、危险字符、验证长度、验证网址、验证小数、整数、浮点数等常用的验证,有了这些代码片段,平时的表单验证也可以不需要jquery的验证插件了,希望可以帮到大家。。。
71、原生JavaScript判断是否为邮箱
function isEmail(str){ var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; if (re.test(str) != true) { return false; }else{ return true; } }
72、原生JavaScript判断是否有列表中的危险字符
function isValidReg(chars){ var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|||◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/; if (re.test( chars) == true) { return false; }else{ return true; } }
73、原生JavaScript判断字符串是否大于规定的长度
function isValidLength(chars, len) { if (chars.length < len) { return false; } return true; }
74、原生JavaScript判断字符串是为网址不区分大小写
function isValidURL( chars ) { var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/; if (!isNULL(chars)) { chars = jsTrim(chars); if (chars.match(re) == null) return false; else return true; } return false; }
75、原生JavaScript判断字符串是否为小数
function isValidDecimal( chars ) { var re=/^\d*\.?\d{1,2}$/; if (chars.match(re) == null) return false; else return true; }
76、原生JavaScript判断字符串是否为整数
function isNumber( chars ) { var re=/^\d*$/; if (chars.match(re) == null) return false; else return true; }
77、原生JavaScript判断字符串是否为浮点数
function isFloat( str ) { for(i=0;i<str.length;i++) { if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){ return false; } } return true; }
78、原生JavaScript判断字符是否为A-Za-z英文字母
function isLetters( str ){ var re=/^[A-Za-z]+$/; if (str.match(re) == null) return false; else return true; }
79、原生JavaScript判断字符串是否邮政编码
function isValidPost( chars ) { var re=/^\d{6}$/; if (chars.match(re) == null) return false; else return true; }
80、原生JavaScript判断字符是否空NULL
function isNULL( chars ) { if (chars == null) return true; if (jsTrim(chars).length==0) return true; return false; }
81、原生JavaScript用正则表达式提取页面代码中所有网址
var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,""); alert(aa)
82、原生JavaScript用正则表达式清除相同的数组(低效率)
Array.prototype.unique=function(){ return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse(); }
83、原生JavaScript用正则表达式清除相同的数组(高效率)
String.prototype.unique=function(){ var x=this.split(/[\r\n]+/); var y=''; for(var i=0;i<x.length;i++){ if(!new RegExp("^"+x[i].replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){ y+=x[i]+"\r\n" } } return y }
84、原生JavaScript用正则表达式按字母排序,对每行进行数组排序
function SetSort(){ var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序 var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序 K1.value=K1.value!=text?text:test; }
85、原生JavaScript字符串反序
function IsReverse(text){ return text.split('').reverse().join(''); }
86、原生JavaScript用正则表达式清除html代码中的脚本
function clear_script(){ K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,""); }
87、原生JavaScript动态执行JavaScript脚本
function javascript(){ try{ eval(K1.value); }catch(e){ alert(e.message); } }
88、原生JavaScript动态执行VBScript脚本
function vbscript(){ try{ var script=document.getElementById("K1").value; if(script.trim()=="")return; window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript") }catch(e){ alert(e.message); } }
89、原生JavaScript实现金额大写转换函数
function transform(tranvalue) { try { var i = 1; var dw2 = new Array("", "万", "亿"); //大单位 var dw1 = new Array("拾", "佰", "仟"); //小单位 var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用 //以下是小写转换成大写显示在合计大写的文本框中 //分离整数与小数 var source = splits(tranvalue); var num = source[0]; var dig = source[1]; //转换整数部分 var k1 = 0; //计小单位 var k2 = 0; //计大单位 var sum = 0; var str = ""; var len = source[0].length; //整数的长度 for (i = 1; i <= len; i++) { var n = source[0].charAt(len - i); //取得某个位数上的数字 var bn = 0; if (len - i - 1 >= 0) { bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字 } sum = sum + Number(n); if (sum != 0) { str = dw[Number(n)].concat(str); //取得该数字对应的大写数字,并插入到str字符串的前面 if (n == '0') sum = 0; } if (len - i - 1 >= 0) { //在数字范围内 if (k1 != 3) { //加小单位 if (bn != 0) { str = dw1[k1].concat(str); } k1++; } else { //不加小单位,加大单位 k1 = 0; var temp = str.charAt(0); if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位 str = str.substr(1, str.length - 1); str = dw2[k2].concat(str); sum = 0; } } if (k1 == 3) //小单位到千则大单位进一 { k2++; } } //转换小数部分 var strdig = ""; if (dig != "") { var n = dig.charAt(0); if (n != 0) { strdig += dw[Number(n)] + "角"; //加数字 } var n = dig.charAt(1); if (n != 0) { strdig += dw[Number(n)] + "分"; //加数字 } } str += "元" + strdig; } catch(e) { return "0元"; } return str; } //拆分整数与小数 function splits(tranvalue) { var value = new Array('', ''); temp = tranvalue.split("."); for (var i = 0; i < temp.length; i++) { value[i] = temp[i]; } return value; }
90、原生JavaScript常用的正则表达式大收集
匹配中文字符的正则表达式: [\u4e00-\u9fa5] 匹配双字节字符(包括汉字在内):[^\x00-\xff] 匹配空行的正则表达式:\n[\s| ]*\r 匹配 HTML 标记的正则表达式:<(.*)>.*<\/\1>|<(.*) \/> 匹配首尾空格的正则表达式:(^\s*)|(\s*$) 匹配 IP 地址的正则表达式:/(\d+)\.(\d+)\.(\d+)\.(\d+)/g 匹配 Email 地址的正则表达式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 匹配网址 URL 的正则表达式:http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)? sql 语句:^(select|drop|delete|create|update|insert).*$ 非负整数:^\d+$ 正整数:^[0-9]*[1-9][0-9]*$ 非正整数:^((-\d+)|(0+))$ 负整数:^-[0-9]*[1-9][0-9]*$ 整数:^-?\d+$ 非负浮点数:^\d+(\.\d+)?$ 正浮点数:^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$ 非正浮点数:^((-\d+\.\d+)?)|(0+(\.0+)?))$ 英文字符串:^[A-Za-z]+$ 英文大写串:^[A-Z]+$ 英文小写串:^[a-z]+$ 英文字符数字串:^[A-Za-z0-9]+$ 英数字加下划线串:^\w+$ E-mail地址:^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$ URL:^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或:^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$ 邮政编码:^[1-9]\d{5}$ 电话号码:^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$ 手机号码:^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$ 双字节字符(包括汉字在内):^\x00-\xff 匹配首尾空格:(^\s*)|(\s*$) 匹配 HTML 标记:<(.*)>.*<\/\1>|<(.*) \/> 匹配空行:\n[\s| ]*\r 提取信息中的网络链接:(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 提取信息中的邮件地址:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 提取信息中的图片链接:(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 提取信息中的 IP 地址:(\d+)\.(\d+)\.(\d+)\.(\d+) 提取信息中的中国手机号码:(86)*0*13\d{9} 提取信息中的中国固定电话号码:(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8} 提取信息中的中国电话号码(包括移动和固定电话):(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14} 提取信息中的中国邮政编码:[1-9]{1}(\d+){5} 提取信息中的浮点数(即小数):(-?\d*)\.?\d+ 提取信息中的任何数字 :(-?\d*)(\.\d+)? IP:(\d+)\.(\d+)\.(\d+)\.(\d+) 电话区号:^0\d{2,3}$ 腾讯 QQ 号:^[1-9]*[1-9][0-9]*$ 帐号(字母开头,允许 5-16 字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 中文、英文、数字及下划线:^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript实现窗体改变事件resize的操作(兼容所以的浏览器)
(function(){ var fn = function(){ var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth ,r = 1255 ,b = Element.extend(document.body) ,classname = b.className; if(w < r){ //当窗体的宽度小于1255的时候执行相应的操作 }else{ //当窗体的宽度大于1255的时候执行相应的操作 } } if(window.addEventListener){ window.addEventListener('resize', function(){ fn(); }); }else if(window.attachEvent){ window.attachEvent('onresize', function(){ fn(); }); } fn(); })();
92、原生JavaScript用正则清除空格分左右
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); } function rtrim(s){ return s.replace( /(\s*| *)$/, ""); } function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判断变量是否空值
/** * 判断变量是否空值 * undefined, null, '', false, 0, [], {} 均返回true,否则返回false */ function empty(v){ switch (typeof v){ case 'undefined' : return true; case 'string' : if(trim(v).length == 0) return true; break; case 'boolean' : if(!v) return true; break; case 'number' : if(0 === v) return true; break; case 'object' : if(null === v) return true; if(undefined !== v.length && v.length==0) return true; for(var k in v){return false;} return true; break; } return false; }
94、原生JavaScript实现base64解码
function base64_decode(data){ var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = []; if (!data) { return data; } data += ''; do { h1 = b64.indexOf(data.charAt(i++)); h2 = b64.indexOf(data.charAt(i++)); h3 = b64.indexOf(data.charAt(i++)); h4 = b64.indexOf(data.charAt(i++)); bits = h1 << 18 | h2 << 12 | h3 << 6 | h4; o1 = bits >> 16 & 0xff; o2 = bits >> 8 & 0xff; o3 = bits & 0xff; if (h3 == 64) { tmp_arr[ac++] = String.fromCharCode(o1); } else if (h4 == 64) { tmp_arr[ac++] = String.fromCharCode(o1, o2); } else { tmp_arr[ac++] = String.fromCharCode(o1, o2, o3); } } while (i < data.length); dec = tmp_arr.join(''); dec = utf8_decode(dec); return dec; }
95、原生JavaScript实现utf8解码
function utf8_decode(str_data){ var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ''; while (i < str_data.length) { c1 = str_data.charCodeAt(i); if (c1 < 128) { tmp_arr[ac++] = String.fromCharCode(c1); i++; } else if (c1 > 191 && c1 < 224) { c2 = str_data.charCodeAt(i + 1); tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63)); i += 2; } else { c2 = str_data.charCodeAt(i + 1); c3 = str_data.charCodeAt(i + 2); tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return tmp_arr.join(''); }
96、原生JavaScript获取窗体可见范围的宽与高
function getViewSize(){ var de=document.documentElement; var db=document.body; var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth; var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight; return Array(viewW ,viewH); }
97、原生JavaScript判断IE版本号(既简洁、又向后兼容!)
var _IE = (function(){ var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i'); while ( div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->', all[0] ); return v > 4 ? v : false ; }());
98、原生JavaScript获取浏览器版本号
function browserVersion(types) { var other = 1; for (i in types) { var v = types[i] ? types[i] : i; if (USERAGENT.indexOf(v) != -1) { var re = new RegExp(v + '(\\/|\\s|:)([\\d\\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[2] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; } else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other; }
99、原生JavaScript半角转换为全角函数
function ToDBC(str){ var result = ''; for(var i=0; i < str.length; i++){ code = str.charCodeAt(i); if(code >= 33 && code <= 126){ result += String.fromCharCode(str.charCodeAt(i) + 65248); }else if (code == 32){ result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32); }else{ result += str.charAt(i); } } return result; }
100、原生JavaScript全角转换为半角函数
function ToCDB(str){ var result = ''; for(var i=0; i < str.length; i++){ code = str.charCodeAt(i); if(code >= 65281 && code <= 65374){ result += String.fromCharCode(str.charCodeAt(i) - 65248); }else if (code == 12288){ result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32); }else{ result += str.charAt(i); } } return result; }