about form load problem

[hjzhbb7758]

Code:

$.extend($.fn.form.methods, {
	MyloadData : function(jq, data) {
		return jq.each(function() {
			load(this, data);
		});

		function load(target, data) {
			if (!$.data(target, 'form')) {
				$.data(target, 'form', {
					options : $.extend({}, $.fn.form.defaults)
				});
			}
			var opts = $.data(target, 'form').options;

			if (typeof data == 'string') {
				var param = {};
				if (opts.onBeforeLoad.call(target, param) == false)
					return;

				$.ajax({
					url : data,
					data : param,
					dataType : 'json',
					success : function(data) {
						_load(data);
					},
					error : function() {
						opts.onLoadError.apply(target, arguments);
					}
				});
			} else {
				_load(data);
			}
			function _load(data) {
				var form = $(target);
				var formFields = form.find("input[name],select[name],textarea[name]");
				formFields.each(function() {
					var name = this.name;
					var value = jQuery.proxy(function() {
						try {
							return eval('this.' + name);
						} catch (e) {
							return "";
						}
					}, data)();
					var rr = _checkField(name, value);
					if (!rr.length) {
						var f = form.find("input[numberboxName=\"" + name + "\"]");
						if (f.length) {
							f.numberbox("setValue", value);
						} else {
							$("input[name=\"" + name + "\"]", form).val(value);
							$("textarea[name=\"" + name + "\"]", form).val(value);
							$("select[name=\"" + name + "\"]", form).val(value);
						}
					}
					_loadCombo(name, value);
				});
				opts.onLoadSuccess.call(target, data);
				$(target).form("validate");
			}

			function _checkField(name, val) {
				var rr = $(target).find('input[name="' + name + '"][type=radio], input[name="' + name + '"][type=checkbox]');
				rr._propAttr('checked', false);
				rr.each(function() {
					var f = $(this);
					if (f.val() == String(val) || $.inArray(f.val(), val) >= 0) {
						f._propAttr('checked', true);
					}
				});
				return rr;
			}

			function _loadCombo(name, val) {
				var form = $(target);
				var cc = [ 'combobox', 'combotree', 'combogrid', 'datetimebox', 'datebox', 'combo' ];
				var c = form.find('[comboName="' + name + '"]');
				if (c.length) {
					for (var i = 0; i < cc.length; i++) {
						var type = cc[i];
						if (c.hasClass(type + '-f')) {
							if (c[type]('options').multiple) {
								c[type]('setValues', val);
							} else {
								c[type]('setValue', val);
							}
							return;
						}
					}
				}
			}
		}
	}
});

use "MyloadData" method in easyui1.3.6 can be load this Data  {dept:{id:'001', name:'us'}} 
why easyui 1.4.1 ,is't not work?