var pop;
  function showLayer(title,url,widths,heights)
  {
    pop=new Popup({ contentType:1,isReloadOnClose:false,width:widths,height:heights});
    pop.setContent("contentUrl",url);
    pop.setContent("title",title);
    pop.build();
    pop.show();
   }
 function closeLayer(){
     pop.close();
  }