Easyui下拉菜单，并设置默认值

<input class="easyui-combobox" id="workSheetType" name="workSheetType" style="width:150px;height:30px;">

$(function(){
	$("#workSheetType").combobox({
		url:"${pageContext.request.contextPath}/selectAllDict?tableID=WorkSheet",
		valueField:"dictNo",
		textField:"dictName",
		onLoadSuccess:function(data){
			var fieldValue = '${workSheetData.workSheetType}';
			setSelect(data, fieldValue, $("#workSheetType"));
		}	
	})
})

function setSelect(data, field, obj) {
        var IsExist = 1;
        for (var i = 0; i < data.length; i++) {
            if (data[i].dictNo == field) {
                obj.combobox('setValue', data[i].dictNo);
                IsExist = 0;
            }
        }
        if (IsExist == 1) {
            obj.combobox('setValue','');
        }
    }