JQuery设置checkbox的值，取checkbox的值，设置radio的值，取radio的值，设置下拉选select的值，取select的值

一、复选框设置参数

html代码如下：

<div class="flsm_btns">
         <input type="hidden" name="agreeFlagValue" id="agreeFlagValue"
          value="${copyRight.agreeFlag}"/>
         <input type="checkbox" name="agreeFlag" id="agreeFlag" />
      <span>
       <a id="low-declare" target="_blank" href="${pageContext.request.contextPath}/web/law">
       我已阅读酷漫网相关法律声明
       </a>
      </span>
     </div>

$(function(){

      var agreeFlagValue = $("#agreeFlagValue").attr("value");
      if(agreeFlagValue != "" && agreeFlagValue == "1") {
          $("#agreeFlag").attr("checked",true);
      } else {
          $("#agreeFlag").attr("checked",false);
      }

});

获取checkbox的值，并判断

console.log(document.getElementById("agreeFlag").checked);
 var agreeFlag = (document.getElementById("agreeFlag").checked == true) ? 1 : 0;
 if(agreeFlag == 0) {
     lock = false;
     alert("对不起，您得先同意酷漫网相关法律声明才可以发布版权信息!");
     $("#low-declare").css("color","red");
 } else {
  lock = true;
  $("#low-declare").css("color","#2d3e53");
 }
 

二、设置radio的参数值

html代码如下：

<div class="upl">
      <div class="uplena">信息有效期限：</div>
      <div class="upricon mt10">
          <input type="hidden" name="termOfValidityValue" id="termOfValidityValue"
           value="${copyRight.termOfValidity}"/>
       <div class="checkbox">
        <input type="radio" name="termOfValidity" value="14天"/><span>14天</span>
       </div>
       <div class="checkbox">
        <input type="radio" name="termOfValidity" value="一个月"/><span>一个月</span>
       </div>
       <div class="checkbox">
        <input type="radio" name="termOfValidity" value="无限期"/><span>无限期</span>
       </div>
      </div>
     </div>

$(function(){   
     var termOfValidityValue = $("#termOfValidityValue").attr("value");
     if(termOfValidityValue != "") {
         $("input[name='termOfValidity'][value='" + termOfValidityValue + "']").attr("checked","checked");
     } else {
         $("input[name='termOfValidity'][value!='" + termOfValidityValue + "']").removeAttr("checked");
     }

});

获取radio的选中值：

/* 本信息有效期限 */
 var termOfValidity = $('input[name="termOfValidity"]:checked').val();

三、获取selected的值

设置选中状态：
$("#filter_item_con select option:first").attr("selected","selected");

获取选中值：

var selectedCity = $("#filter_item_con #city option:selected").attr("value");