在网页中怎么隐藏图层？

• 回答：

   {
      var winWidth = 440;
      var winHeight = 140;
      var winLeft = (screen.width - winWidth) / 2;
      var winTop = (screen.height - winHeight) / 2 - 20;
      var str = 'dialogHeight:' + winHeight + 'px;dialogWidth:' + winWidth + 'px;dialogTop:' + winTop + 'px;dialogLeft:' + winLeft + 'px;resizable:yes;center:yes;status:no;'
      var rt = window.showModalDialog("Gettext.htm?tmp=" + Math.random(), "输入图层名", str);
      var txt;
      if (typeof (rt) == "undefined") {
          return;
      } else {
          var arr = rt.split(",");
          txt = arr[0];
      }
      var database = mxOcx.GetDatabase();
      //返回数据库中的层表对象
      var layerTable = database.GetLayerTable();
      //得到层表中的图层对象
      var layerRec = layerTable.GetAt(txt, false);
      if (layerRec == null)
          return;
      //返回图层是否处于关闭状态
      layerRec.IsOff = true;
      alert("成功隐藏图层");