点击事件preview
function preview(){
                    
        var win=window.open('','','width=200,height=200');
            for(i=1;i<7;i++){
                var "txt_"+i+"" = "<div><table><tr><td>"+i+"</td></tr></table></div>";
                
                  win.document.write("txt_"+i+"");
                  alert("txt_"+i+"");
            }
          //var txt_1 = "<div><table><tr><td>123</td></tr></table></div>";
          //var txt_2 = "<div><table><tr><td>2</td></tr></table></div>";
          win.document.open("text/html","replace");
          //win.document.write(txt_1);
                    //win.document.write(txt_2);
          win.document.close();
          
    }

   var txt = new Array;
            for(i=1;i<7;i++){
                txt[i] = "<div><table><tr><td>" + i + "</td></tr></table></div>";
                win.document.write(txt[i]);
           //     alert(txt[i]);
            }