function prn1_preview() {

         var LODOP = getLodop(document.getElementById('LODOP_OB'), document.getElementById('LODOP_EM'));

         LODOP.PRINT_INIT("打印控件功能演示_Lodop功能_打印表格");

         var theads = "<thead ><tr><th width='300px'>菜名</th><th width='50px'>份数</th><th width='50px'>价格</th><th width='150px'>姓名</th><th                          width='150px'>时间</th></tr></thead>"

         var tableBodyStar = "<table border='1'>";

         var tableBodyEnd = "</table>";

         var tableHead = "<caption style='width:200px;'>点餐列表</caption>"

         var tableBody;

         $(LodopValue).each(function () {

             var menuname = "<tr><th width='300px'>" + this.menu_name;

             var listnumber = "</th><td width='50px'>" + this.list_number;

             var clistprice = "</td><td width='50px'>" + this.clist_price;

             var employeeloginName = "</td><td width='150px'>" + this.employee_loginName;

             var clisttime = "</td><td width='150px'>" + timeS(this.clist_time);

          //   alert(menuname);

           tableBody += menuname + listnumber + clistprice + employeeloginName + clisttime + "</td></tr>";

           //  alert(tableBody);

         });

       var t = tableBodyStar;

         t += tableHead;

         t += theads;

         t += tableBody;

         t += tableBodyEnd;

         LODOP.ADD_PRINT_HTM(60, 20, 800, 1000, t );

         LODOP.PREVIEW();

     };