// JavaScript Document
/*
չʾ Òþ²Ø div²ã
Çл»Ä£Ê½¿éµÄ ±³¾°Í¼
**/
function showLayer(id)
{

     for(var i=1;i<=4;i++)
	{
		if(i == id )
		{
			document.getElementById("section"+id).style.display="block";
			document.getElementById('b'+id).style.backgroundImage='url(img/lightBack.jpg)';
		
		}
		else
		{	
		   document.getElementById("section"+i).style.display="none";
		   document.getElementById('b'+i).style.backgroundImage='url(img/DarkBack2.jpg)';
		}
	}


}