javascript格式化数字，如 8888.85745 格式化成 8,888.86
<html>
<head>
<title> New Document </title>
</head>
<body>
<script language="JavaScript">
<!--
//lael 2005-11-09
function formatnumber(fnumber,fdivide,fpoint,fround){
var fnum = fnumber + '';
var revalue="";
if(fnum==null){
for(var i=0;i<fpoint;i++)revalue+="0";
return "0."+revalue;
}
fnum = fnum.replace(/^\s*|\s*$/g,'');
if(fnum==""){
for(var i=0;i<fpoint;i++)revalue+="0";
return "0."+revalue;
}
fnum=fnum.replace(/,/g,"");
if(fround){
var temp = "0.";
for(var i=0;i<fpoint;i++)temp+="0";
temp += "5";
fnum = Number(fnum) + Number(temp);
fnum += '';
}
var arrayf=fnum.split(".");
if(fdivide){
if(arrayf[0].length>3){
while(arrayf[0].length>3){
revalue=","+arrayf[0].substring(arrayf[0].length-3,arrayf[0].length)+revalue;
arrayf[0]=arrayf[0].substring(0,arrayf[0].length-3);
}
}
}
revalue=arrayf[0]+revalue;
if(arrayf.length==2&&fpoint!=0){
arrayf[1]=arrayf[1].substring(0,(arrayf[1].length<=fpoint)?arrayf[1].length:fpoint);
if(arrayf[1].length<fpoint)
for(var i=0;i<fpoint-arrayf[1].length;i++)arrayf[1]+="0";
revalue+="."+arrayf[1];
}else if(arrayf.length==1&&fpoint!=0){
revalue+=".";
for(var i=0;i<fpoint;i++)revalue+="0";
}
return revalue;
}
//-->
</script>
<input name="text1" type="text" value="" onblur="this.value=formatnumber(this.value, true, 2, true)" />
</body>
</html>
//日期比较
function datecompare(date1, date2){
var d1 = new Date(date1.replace(/\-/g, "\/"));
var d2 = new Date(date2.replace(/\-/g, "\/"));
var flag = true;
if(isNaN(d1) || isNaN(d2))flag = false;//不是日期
if(flag &&
d1.getFullYear() > d2.getFullYear()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() > d2.getMonth()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() == d2.getMonth() &&
d1.getDate() > d2.getDate()){
flag = false;
}
return flag;
}
//cookie
function getcookievalue(sname){
var svalue="";
var sname=sname+"=";
if(document.cookie.length>0){
offset=document.cookie.indexOf(sname);
if(offset!=-1){
offset+=sname.length;
end=document.cookie.indexOf(";",offset);
if(end==-1)end=document.cookie.length;
svalue=unescape(document.cookie.substring(offset,end))
}
}
return svalue;
}
function setcookievalue(sname,svalue){
var expire="";
expire=new Date((new Date()).getTime()+31536000);
expire="; expires="+expire.toGMTString();
document.cookie=sname+"="+escape(svalue)+expire;
}
光标处插入或修改文字
function storeCaret(_obj1){
if(_obj1.createTextRange)
_obj1.caretPos = document.selection.createRange().duplicate();
}
function insertAtCaret() {
var _obj1 = document.getElementById("textarea1");
var _text = "[b]";
_obj1.focus();
storeCaret(_obj1);
if(_obj1.createTextRange && _obj1.caretPos){
var caretPos = _obj1.caretPos;
caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ?_text + ' ' : _text;
}else _obj1.value = _text;
}
JS图片动画效果
效果：http://www.carsclub.com.cn/
<style>
#flash_img {
filter: revealtrans(duration=2.0,transition=12); width: 100%;
}
</style>
<table border="0" align="right" cellpadding="0" cellspacing="0">
<tr>
<td class="focus-ctl-nows" id="flash_show_ctl_0" onClick="showImage(0);">1</td>
<td class="focus-ctl" id="flash_show_ctl_1" onClick="showImage(1);">2</td>
<td class="focus-ctl" id="flash_show_ctl_2" onClick="showImage(2);">3</td>
<td class="focus-ctl" id="flash_show_ctl_3" onClick="showImage(3);">4</td>
<td class="focus-ctl" id="flash_show_ctl_4" onClick="showImage(4);">5</td>
<td> </td>
</tr>
</table>
<div id="flash_img" style="width:334px; height:167px;"></div>
cript language="javascript">
<!-
<s-
////////////////begin
var showImageIndex = -1;
var imageTimer = null;
function showImage(imageIndex)
{
var flash_img_div = document.getElementById("flash_img");
if(imageIndex>=fImgs.length){
imageIndex = 0;
}
if(!fImgs[imageIndex] || imageIndex==showImageIndex)return false;
var imgId = "__fImg"+imageIndex;
flash_img_div.filters && flash_img_div.filters[0].Apply();
for(var i=0; i<flash_img_div.childNodes.length; i++){
flash_img_div.removeChild(flash_img_div.childNodes[i]);
}
for(var i=0; i<fImgs.length;i++){
if(i == imageIndex)continue;
document.getElementById("flash_show_ctl_" + i).className = "focus-ctl";
}
document.getElementById("flash_show_ctl_" + imageIndex).className = "focus-ctl-nows";
var pos = fImgs[imageIndex].img.lastIndexOf(".");
if( fImgs[imageIndex].img.substr(pos+1).substr(0,3).toLowerCase()=="swf" ){
flash_img_div.innerHTML += '\
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="334" height="167" id="'+imgId+'">\
<param name="movie" value="'+fImgs[imageIndex].img+'" />\
<param name="quality" value="high" />\
<param name="wmode" value="transparent">\
<param name="scale" value="exactfit">\
<embed src="'+fImgs[imageIndex].img+'" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="334" height="167"></embed>\
</object>';
}else{
var img = new Image();
img.border = "0";
img.src = fImgs[imageIndex].img;
img.width = "334";
img.height = "167";
var a = document.createElement("a");
a.href = fImgs[imageIndex].href;
a.title = fImgs[imageIndex].title;
a.target = "_blank";
a.id = imgId;
a.appendChild(img);
flash_img_div.appendChild(a);
}
flash_img_div.filters && flash_img_div.filters[0].Play();
showImageIndex = imageIndex;
return true;
}
function imagePlay()
{
if(imageTimer) return;
if(showImageIndex>=fImgs.length){
showImageIndex = -1;
}
showImage(showImageIndex+1);
imageTimer = setInterval(function(){
var stat = showImage(showImageIndex+1);
if(!stat){
imageStop();
}
},8000);
}
function imageStop(){
if(imageTimer)clearInterval(imageTimer);
imageTimer = null;
}
function showNextImage(){
showImage(showImageIndex+1);
}
function showPrevImage(){
showImage(showImageIndex-1);
}
var fImgs = new Array();
fImgs[0] = {title:"",img:"upload/images/subject/2007-02-06/1174915891_outline.jpg",href:"news.php?id=220"};
fImgs[1] = {title:"",img:"upload/images/subject/2007-02-06/1175244094_outline.jpg",href:"news.php?id=212"};
fImgs[2] = {title:"",img:"upload/images/subject/2007-02-06/1177150583_outline.jpg",href:"news.php?id=219"};
fImgs[3] = {title:"",img:"upload/images/subject/2007-02-06/1175897263_outline.jpg",href:"news.php?id=217"};
fImgs[4] = {title:"",img:"upload/images/subject/2007-02-06/1177509461_outline.jpg",href:"news.php?id=213"};
////////////////end
window.document.body.onload = new function(){
imagePlay();//焦点图文
}
//-->
<html>
<head>
<title> New Document </title>
</head>
<body>
<script language="JavaScript">
<!--
//lael 2005-11-09
function formatnumber(fnumber,fdivide,fpoint,fround){
var fnum = fnumber + '';
var revalue="";
if(fnum==null){
for(var i=0;i<fpoint;i++)revalue+="0";
return "0."+revalue;
}
fnum = fnum.replace(/^\s*|\s*$/g,'');
if(fnum==""){
for(var i=0;i<fpoint;i++)revalue+="0";
return "0."+revalue;
}
fnum=fnum.replace(/,/g,"");
if(fround){
var temp = "0.";
for(var i=0;i<fpoint;i++)temp+="0";
temp += "5";
fnum = Number(fnum) + Number(temp);
fnum += '';
}
var arrayf=fnum.split(".");
if(fdivide){
if(arrayf[0].length>3){
while(arrayf[0].length>3){
revalue=","+arrayf[0].substring(arrayf[0].length-3,arrayf[0].length)+revalue;
arrayf[0]=arrayf[0].substring(0,arrayf[0].length-3);
}
}
}
revalue=arrayf[0]+revalue;
if(arrayf.length==2&&fpoint!=0){
arrayf[1]=arrayf[1].substring(0,(arrayf[1].length<=fpoint)?arrayf[1].length:fpoint);
if(arrayf[1].length<fpoint)
for(var i=0;i<fpoint-arrayf[1].length;i++)arrayf[1]+="0";
revalue+="."+arrayf[1];
}else if(arrayf.length==1&&fpoint!=0){
revalue+=".";
for(var i=0;i<fpoint;i++)revalue+="0";
}
return revalue;
}
//-->
</script>
<input name="text1" type="text" value="" onblur="this.value=formatnumber(this.value, true, 2, true)" />
</body>
</html>
//日期比较
function datecompare(date1, date2){
var d1 = new Date(date1.replace(/\-/g, "\/"));
var d2 = new Date(date2.replace(/\-/g, "\/"));
var flag = true;
if(isNaN(d1) || isNaN(d2))flag = false;//不是日期
if(flag &&
d1.getFullYear() > d2.getFullYear()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() > d2.getMonth()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() == d2.getMonth() &&
d1.getDate() > d2.getDate()){
flag = false;
}
return flag;
}
//cookie
function getcookievalue(sname){
var svalue="";
var sname=sname+"=";
if(document.cookie.length>0){
offset=document.cookie.indexOf(sname);
if(offset!=-1){
offset+=sname.length;
end=document.cookie.indexOf(";",offset);
if(end==-1)end=document.cookie.length;
svalue=unescape(document.cookie.substring(offset,end))
}
}
return svalue;
}
function setcookievalue(sname,svalue){
var expire="";
expire=new Date((new Date()).getTime()+31536000);
expire="; expires="+expire.toGMTString();
document.cookie=sname+"="+escape(svalue)+expire;
}
光标处插入或修改文字
function storeCaret(_obj1){
if(_obj1.createTextRange)
_obj1.caretPos = document.selection.createRange().duplicate();
}
function insertAtCaret() {
var _obj1 = document.getElementById("textarea1");
var _text = "[b]";
_obj1.focus();
storeCaret(_obj1);
if(_obj1.createTextRange && _obj1.caretPos){
var caretPos = _obj1.caretPos;
caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ?_text + ' ' : _text;
}else _obj1.value = _text;
}
JS图片动画效果
效果：http://www.carsclub.com.cn/
<style>
#flash_img {
filter: revealtrans(duration=2.0,transition=12); width: 100%;
}
</style>
<table border="0" align="right" cellpadding="0" cellspacing="0">
<tr>
<td class="focus-ctl-nows" id="flash_show_ctl_0" onClick="showImage(0);">1</td>
<td class="focus-ctl" id="flash_show_ctl_1" onClick="showImage(1);">2</td>
<td class="focus-ctl" id="flash_show_ctl_2" onClick="showImage(2);">3</td>
<td class="focus-ctl" id="flash_show_ctl_3" onClick="showImage(3);">4</td>
<td class="focus-ctl" id="flash_show_ctl_4" onClick="showImage(4);">5</td>
<td> </td>
</tr>
</table>
<div id="flash_img" style="width:334px; height:167px;"></div>
cript language="javascript">
<!-
<s-
////////////////begin
var showImageIndex = -1;
var imageTimer = null;
function showImage(imageIndex)
{
var flash_img_div = document.getElementById("flash_img");
if(imageIndex>=fImgs.length){
imageIndex = 0;
}
if(!fImgs[imageIndex] || imageIndex==showImageIndex)return false;
var imgId = "__fImg"+imageIndex;
flash_img_div.filters && flash_img_div.filters[0].Apply();
for(var i=0; i<flash_img_div.childNodes.length; i++){
flash_img_div.removeChild(flash_img_div.childNodes[i]);
}
for(var i=0; i<fImgs.length;i++){
if(i == imageIndex)continue;
document.getElementById("flash_show_ctl_" + i).className = "focus-ctl";
}
document.getElementById("flash_show_ctl_" + imageIndex).className = "focus-ctl-nows";
var pos = fImgs[imageIndex].img.lastIndexOf(".");
if( fImgs[imageIndex].img.substr(pos+1).substr(0,3).toLowerCase()=="swf" ){
flash_img_div.innerHTML += '\
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="334" height="167" id="'+imgId+'">\
<param name="movie" value="'+fImgs[imageIndex].img+'" />\
<param name="quality" value="high" />\
<param name="wmode" value="transparent">\
<param name="scale" value="exactfit">\
<embed src="'+fImgs[imageIndex].img+'" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="334" height="167"></embed>\
</object>';
}else{
var img = new Image();
img.border = "0";
img.src = fImgs[imageIndex].img;
img.width = "334";
img.height = "167";
var a = document.createElement("a");
a.href = fImgs[imageIndex].href;
a.title = fImgs[imageIndex].title;
a.target = "_blank";
a.id = imgId;
a.appendChild(img);
flash_img_div.appendChild(a);
}
flash_img_div.filters && flash_img_div.filters[0].Play();
showImageIndex = imageIndex;
return true;
}
function imagePlay()
{
if(imageTimer) return;
if(showImageIndex>=fImgs.length){
showImageIndex = -1;
}
showImage(showImageIndex+1);
imageTimer = setInterval(function(){
var stat = showImage(showImageIndex+1);
if(!stat){
imageStop();
}
},8000);
}
function imageStop(){
if(imageTimer)clearInterval(imageTimer);
imageTimer = null;
}
function showNextImage(){
showImage(showImageIndex+1);
}
function showPrevImage(){
showImage(showImageIndex-1);
}
var fImgs = new Array();
fImgs[0] = {title:"",img:"upload/images/subject/2007-02-06/1174915891_outline.jpg",href:"news.php?id=220"};
fImgs[1] = {title:"",img:"upload/images/subject/2007-02-06/1175244094_outline.jpg",href:"news.php?id=212"};
fImgs[2] = {title:"",img:"upload/images/subject/2007-02-06/1177150583_outline.jpg",href:"news.php?id=219"};
fImgs[3] = {title:"",img:"upload/images/subject/2007-02-06/1175897263_outline.jpg",href:"news.php?id=217"};
fImgs[4] = {title:"",img:"upload/images/subject/2007-02-06/1177509461_outline.jpg",href:"news.php?id=213"};
////////////////end
window.document.body.onload = new function(){
imagePlay();//焦点图文
}
//-->
</script>
本文转自博客园执着的笨蛋的博客，原文链接：javascript函数（格式化数字，日期比较，光标处插入或修改文字，JS图片动画效果），如需转载请自行联系原博主。
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