Uncaught TypeError: Cannot read property 'options' of undefined

[qq_35200358]

function detail(id){
	
	var str="{\"id\":\""+id+"\"}";

	$.ajax({
		type:'POST',
		url:'../GetStudentDetailService',
		data:{detailid:str,},
		dataType:'json',
		success : function (data,response,status) {
			if (data) {						
				$('#getstudentdetail').form('load',{
					name:data.studentName,
					birthdate:data.birthDate,
					address:data.addr,
					leftclasses:data.leftClasses,
					finshcourse:data.finishCourse,
					gender:data.gender,
				}).dialog('open');
				
				debugger;
				
			}else{
				$.messager.alert('获取失败','未知错误导致失败，请重试！','warning');
			}
		},
	});	
}

我的form:
<form id="getstudentdetail" style="margin:0;padding:5px 0 0 25px;color:#333;">
<span>学生姓名:</span>
<input type="text" name="name" id="name" disabled="true" style="width:200px;" class="easyui-textbox"/>
<span>学生性别：</span>
<input type="radio" id="gender" name="gender" checked="checked" value="1"/>男
<input type="radio" name="gender" value="0"/>女
<span>出生日期：</span>
<input type="text" name="birthdate" id="birthdate" disabled="true" style="width:200px;" class="easyui-textbox"/>
<span>居住地址:</span>
<input type="text" name="address" id="address" disabled="true" style="width:200px;" class="easyui-textbox"/>
<span>剩余课时</span>
<input type="text" name="leftclasses" id="leftclasses" disabled="true" style="width:200px;" class="easyui-textbox"/>
<span>已完成：</span>
<input type="text" name="finshcourse" id="finshcourse" disabled="true" style="width:200px;" class="easyui-textbox"/>
<span>本周课表：</span>
<input />
</form>

错误：
能获取到ajax成功传回来的data，但是打不开form,报错如下：
Uncaught TypeError: Cannot read property 'options' of undefined
at _239 (jquery.easyui.min.js:3111)
at HTMLFormElement.<anonymous> (jquery.easyui.min.js:3372)
at Function.each (jquery.min.js:2)
at m.fn.init.each (jquery.min.js:2)
at Object.open (jquery.easyui.min.js:3371)
at m.fn.init.$.fn.panel (jquery.easyui.min.js:3329)
at m.fn.init.$.fn.window (jquery.easyui.min.js:3731)
at m.fn.init.$.fn.dialog (jquery.easyui.min.js:3889)
at Object.success (eval at <anonymous> (jquery.min.js:2), <anonymous>:21:8)
at j (jquery.min.js:2)


function _239(_23a,_23b){
var opts=$.data(_23a,"panel").options;---------》错误
var _23c=$.data(_23a,"panel").panel;
if(_23b!=true){
if(opts.onBeforeOpen.call(_23a)==false){
return;
}
}