JS显示模态窗口

  function showUploadDialog()
    {
        var theDes = "dialogWidth:400px;dialogHeight:130px;help:no;status:no;scroll:no";
        var result =window.showModalDialog("../Other/UploadPhoto.aspx?x="+ Math.random(), '', theDes);
       
         if (result=='' || result==undefined)
         {
           
         }
         else
         {
            setReturnValue(result);
         };
        return false;
 
    }