jQuery提交表单ajax查询实例代码

<script language="javascript" type="text/javascript">
$(document).ready(function() {
$("#btnSubmit").click(function() {
Login();
});
});
function Login() {
if (Check()) {
LoginSuccess();
}
}
function Check() {
if ($("#ksbh").val() == "") {
alert("准考证号不能为空！");
$("#ksbh").focus();
return false;
}
if ($("#Yzm").val() != $.cookie('ValidateCode')) {
alert("验证码错误！")
$("#Yzm").focus();
return false;
}
return true;
}
function LoginSuccess() {
$.ajax({
type: "POST",
url: "/zk/zkcj201204a",
data: { ksbh: $("#ksbh").val()},
beforeSend: function() { $("#msg").html("loading......正在提交请稍候。"); },
success: function(data) {
$("#msg").html(data).show();
document.getElementById("valiCode").src = document.getElementById("valiCode").src+'?';
}
});
}
</script>

<div id="lmain">
<div><span class="s1">准考证号：</span><span class="s2"><input id="ksbh" maxlength="12" name="ksbh" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" onkeyup="value=value.replace(/[^\d]/g,'')" type="text" value="" /></span></div>
<div><span class="s1">验证码：</span><span class="s3"><input id="Yzm" name="Yzm" type="text" value="" /><img id="valiCode" style="cursor: pointer;height:22px; line-height:22px; vertical-align:middle;" src="../Validate/GetValidateCode" onclick="this.src=this.src+'?'" alt="看不清？点击更换" /></span></div>
<div style=" text-align:center;"><input type="button" id="btnSubmit" value="查询" /> </div>
</div>
<div id="msg" style=" width:600px;text-align:center; margin-top:20px;"></div>