jquery.validate ajax提交

<style>  //引入错误格式
label.error {
display: block;
margin-left: 1em;
width: auto;
color: red;
}
</style><script type="text/javascript" src="/library/js/jquery.validate.min.js"></script>

<form target="hiddenIframe" id="content">
<div class="modal-body" style="margin-left:110px;">
<label style="float:left" for="fieldType">①字段类型<span style="color:red">*</span>:</label>
<input style="float:left;margin-left:40px;" type="text" name="fieldType" id="fieldType"/>
<br>
<br>
<label style="float:left" for="intro">②字段名称<span style="color:red">*</span>:</label>
<input style="float:left;margin-left:39px;" type="text" name="fieldName" id="fieldName"/>
<br/>
<br/>
<label style="float:left" for="orderNumber">③排序（数字）：</label>
<input style="float:left;margin-left:6px;" type="text" name="orderNumber" id="orderNumber"/>
<br/>
<br/>
<label style="float:left" for="isDisable">④使用情况：</label>
<input type="radio" name="isDisable" value="0"/>禁用
<input type="radio" name="isDisable" value="1" checked/>启用
<br/>
<br/>
<label style="float:left" for="remark">⑤备注：</label><br>
<textarea rows="6" cols="40" name="remark" id="remark"></textarea>
<br>
<br>
<div class="error">error:</div>              //--------错误显示地方
</div>
<div class="modal-footer">
<input id="insertField" type="button" style="margin-left: 150px;margin-top: 20px;" value="新增数据字典" class="btn btn-primary"></a>
<input type="button" style="margin-left: 150px;margin-top: 20px;" value="取消" class="btn btn-primary" data-dismiss="modal" onclick="javascript:window.location.reload();"></a>
<iframe name="hiddenIframe" id="hiddenIframe" style="display:none"></iframe>
</div>
</form>

//验证方法
function valContent(){
return $("#content").validate({
errorLabelContainer: $("#content div.error"),
rules: {
fieldName: { //fieldName 是页面的name属性
required: true
},
orderNumber:{
number: true,
digits: true,
min :0
}
},
messages: {
fieldName: {
required: "请填写字段名称"
},
orderNumber:{
number: "请输入合法的排序数字",
digits: "排序只能输入整数",
min :$.validator.format("不能小于0")
}
}
}).form();
}

//新增数据字典
$("#insertField").click(function(){
var fieldType = $("#fieldType").val();
var fieldName = $("#fieldName").val();
var orderNumber = $("#orderNumber").val();
var isDisable = $("input[type='radio']:checked").val();
var remark = $("#remark").val();

if(valContent()){
$.post(ctx+"/field/insert",{fieldType:fieldType,fieldName:fieldName,orderNumber:orderNumber,isDisable:isDisable,remark:remark},function(msg){
if(msg.success){
$("#myModal").modal('toggle');
loadSignIn();
}
});
}
});