jquery 版本1.10

<div id="container">      

   <!-- Content -->

   <div id="content" class="colM">      

      <div id="content-main">

<div>

<h1>密码修改</h1>

<p>请输入你的旧密码，为了安全起见，接着要输入两遍新密码，以便我们校验你输入的是否正确。</p>

<fieldset class="module aligned wide">

<div class="form-row">

   <label >旧密码:</label><input id="old_password" name="old_password" type="password"><span id="name_info1">*</span>

</div>

<div class="form-row">

   <label >新密码:</label><input id="pass1" name="new_password" type="password"><span id="name_info2">*</span>

</div>

<div class="form-row">

   <label>密码(重复):</label><input id="pass2" name="new_password2" type="password"><span id="name_info3">*</span>

</div>

</fieldset>

<div class="submit-row">

   <input type="submit" value="修改我的密码" class="default">

</div>

<script>$("#old_password").focus();</script>

</div>

</form>

<script type="text/javascript">

$(function() {

$("#old_password").blur(function() {

if($("#old_password").val()=="")

{

$("span#name_info1").text('密码不能为空').css("color","red");

}

else

{

$("span#name_info1").text('√').css("color","green");//1.10 选择器span#name_info 用#name_info是错误的

}

});

$("#pass1").blur(function() {

if($("#pass1").val()=="")

{

$("span#name_info2").text('密码不能为空').css("color","green");

}

else

{

$("span#name_info2").text('√').css("color","green");

}

});

$("#pass2").blur(function() {

if($("#pass2").val()=="")

{

$("span#name_info3").text('密码不能为空').css("color","red");

}

else

{

$("span#name_info3").text('√').css("color","green");

}

});

});

</script>