function checknum(id){
	  
	  var div=document.getElementById(id);
	  //alert(div );
	  div.style.display = "block";
	  //div.style.border="1px";
	  //div.style.borderColor="#000000";
	  //div.style.borderStyle="solid";
	  //div.style.width="500px";
	  //div.style.height="200px";
	  //div.style.position="relative";
  }
    function layer(id){
	  
	  var div=document.getElementById(id);
	  div.style.display = "none";
   
  }