// JavaScript Document
	var myTime = null;
	var myTimeValue = 500;    
	var _st = window.setTimeout;
	window.setTimeout = function(fRef, mDelay){
	 if(typeof fRef == 'function'){ 
	   var argu = Array.prototype.slice.call(arguments,2);
	   var f = (function(){ fRef.apply(null, argu); });  
	   return _st(f, mDelay); 
	  } 
	 return _st(fRef,mDelay);
	}
  
   
	function conceal(layerId)
	{
		myTime = window.setTimeout(undisplay,myTimeValue,layerId);
	}
	
	function concealClose(layerId)
	{
		myTime = window.setTimeout(undisplay,myTimeValue,layerId);
		document.getElementById("classA").style.display="block";
	}

	function undisplay(layerId)
	{
			document.getElementById(layerId).style.display="none";
	}

	function display(layerId)
	{
		if(myTime != null) clearTimeout(myTime);
		document.getElementById(layerId).style.display="block";
	}
		

  function showTab(n,m){
	 for(i=1;i<=m;i++){
		 turnBtn=document.getElementById("turnLi"+i);
		 trunCon=document.getElementById("turnCon"+i);
		 turnBtn.style.background=i==n ?"url(images/bg_opusOn.gif)":"url(images/bg_opusOff.gif)";
		 trunCon.style.display=i==n?"block":"none";
	 }
	   
  }