各种选择框jQuery的选中方法(实例讲解)
select下拉列表的选中方法是：$("slect option:eq(1)").attr("selected",true);//选中第二个option
chekbox的选中方法：$("[value=check1"]:checkbox).attr("checked",true);
radio的选中方法：$("[value=radio2"]:radio).attr("checked",true);
以上是简写，重要的是看代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>3-10-4</title>
<style type="text/css">
.test{
font-weight:bold;
color : red;
}
.add{
font-style:italic;
}
</style>
<!-- 引入jQuery -->
<script src="../../scripts/jquery-1.3.1.js" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
$(function(){
//设置单选下拉框选中
$("input:eq(0)").click(function(){
$("#single option").removeAttr("selected"); //移除属性selected
$("#single option:eq(1)").attr("selected",true); //设置属性selected
});
//设置多选下拉框选中
$("input:eq(1)").click(function(){
$("#multiple option").removeAttr("selected"); //移除属性selected
$("#multiple option:eq(2)").attr("selected",true);//设置属性selected
$("#multiple option:eq(3)").attr("selected",true);//设置属性selected
});
//设置单选框和多选框选中
$("input:eq(2)").click(function(){
$(":checkbox").removeAttr("checked"); //移除属性checked
$(":radio").removeAttr("checked"); //移除属性checked
$("[value=check2]:checkbox").attr("checked",true);//设置属性checked
$("[value=check3]:checkbox").attr("checked",true);//设置属性checked
$("[value=radio2]:radio").attr("checked",true);//设置属性checked
});
});
//]]>
</script>
</head>
<body>
<input type="button" value="设置单选下拉框选中"/>
<input type="button" value="设置多选下拉框选中"/>
<input type="button" value="设置单选框和多选框选中"/>
<br/><br/>
<select id="single">
<option>选择1号</option>
<option>选择2号</option>
<option>选择3号</option>
</select>
<select id="multiple" multiple="multiple" style="height:120px;">
<option selected="selected">选择1号</option>
<option>选择2号</option>
<option>选择3号</option>
<option>选择4号</option>
<option selected="selected">选择5号</option>
</select>
<br/><br/>
<input type="checkbox" value="check1"/> 多选1
<input type="checkbox" value="check2"/> 多选2
<input type="checkbox" value="check3"/> 多选3
<input type="checkbox" value="check4"/> 多选4
<br/>
<input type="radio" value="radio1" name="a"/> 单选1
<input type="radio" value="radio2" name="a"/> 单选2
<input type="radio" value="radio3" name="a"/> 单选3
</body>
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