easyui datagrid 复杂表头

function initTableData(param) {
	var height = $(window).height() - 39 + "px";
	
	var colums=[[{
		"field" : "day_no",
		"title" : "日期",
		"rowspan" : 2,
		width : "8%",
		align : "center"
	},{
		"field" : "node_name",
		"title" : "城市",
		"rowspan" : 2,
		width : "8%",
		align : "center"
	},
	{
		"field" : "all_score",
		"title" : "总得分",
		"rowspan" : 2,
		width : "8%",
		align : "center"
	}, {
		"title" : "",
		"colspan" : 4,
		width : "300"
	}, {
		"title" : "",
		"colspan" : 4,
		width : "300"
	}, {
		"title" : "",
		"colspan" : 4,
		width : "300"
	} ], [ {
		"field" : "move_score",
		"title" : "得分",
		"rowspan" : 1,
		width : "8%",
		align : "center"
	}, {
		"field" : "yd_zc_score",
		"title" : "资产效益(40%)",
		"rowspan" : 1
	}, {
		"field" : "yd_yy_score",
		"title" : "运营效率(30%)",
		"rowspan" : 1
	}, {
		"field" : "yd_gz_score",
		"title" : "客户感知(30%)",
		"rowspan" : 1
	},

	{
		"field" : "broadband_score",
		"title" : "得分",
		"rowspan" : 1,
		width : "8%",
		align : "center"
	}, {
		"field" : "kd_zc_score",
		"title" : "资产效益(40%)",
		"rowspan" : 1
	}, {
		"field" : "kd_yy_score",
		"title" : "运营效率(30%)",
		"rowspan" : 1
	}, {
		"field" : "kd_gz_score",
		"title" : "客户感知(30%)",
		"rowspan" : 1
	},
	{
		"field" : "personnel_score",
		"title" : "得分",
		"rowspan" : 1,
		
		width : "8%",
	}, {
		"field" : "rc_sl_score",
		"title" : "队伍数量",
		"rowspan" : 1
	}, {
		"field" : "rc_nl_score",
		"title" : "队伍质量",
		"rowspan" : 1
	}, {
		"field" : "rc_jg_score",
		"title" : "队伍结构",
		"rowspan" : 1
	}]];
	
	$('#dg').datagrid({
		url : ROOT+"image/imageDate",
		queryParams : param,
		fit : false,
        height: height,
		fitColumns : true,
		rownumbers : true,
		pagination : true,
		checkOnSelect: false,
	    selectOnCheck: false,
		columns : colums,
		 pageNo: 1,
		   pageSize: 20,
		    pageList: [20,40,80,100,1000]
	});
}