easyUI datagrid打印功能实现与兼容

1、jsp调用
包含PrintDg.js
<td><a href="javascript:void(0);" class="easyui-linkbutton c6" 
iconCls="icon-print" onclick="CreateFormPage('${path}/js/index/PrintInfo.html', $('#dgPrtInfo'),'物料基本信息表')" style="width:70px;margin-left:10px">打印</a>

2、PrintDg.js
//strPrintName 打印任务名
//printDatagrid 要打印的datagrid
//title 表格标题
function CreateFormPage(strPrintName, printDatagrid,title) {
 var tableString = '<table cellspacing="0" class="pb">';
 //tableString+="<caption style='font-size: 20px;  font-weight:  bold;'>"+title+"</caption>";
 var frozenColumns = printDatagrid.datagrid("options").frozenColumns;  // 得到frozenColumns对象
 var columns = printDatagrid.datagrid("options").columns;    // 得到columns对象
 var nameList = '';

 // 载入title
 if (typeof columns != 'undefined' && columns != '') {
     $(columns).each(function (index) {
         tableString += '\n<tr>';
         if (typeof frozenColumns != 'undefined' && typeof frozenColumns[index] != 'undefined') {
             for (var i = 0; i < frozenColumns[index].length; ++i) {
                 if (!frozenColumns[index][i].hidden) {
                     tableString += '\n<th width="' + frozenColumns[index][i].width + '"';
                     if (typeof frozenColumns[index][i].rowspan != 'undefined' && frozenColumns[index][i].rowspan > 1) {
                         tableString += ' rowspan="' + frozenColumns[index][i].rowspan + '"';
                     }
                     if (typeof frozenColumns[index][i].colspan != 'undefined' && frozenColumns[index][i].colspan > 1) {
                         tableString += ' colspan="' + frozenColumns[index][i].colspan + '"';
                     }