// JavaScript Document

function swapLayer(it)
{

	hideAll();
	
	elem=document.getElementById(it);
	//elem.runtimeStyle.display="block";
	elem.style.display="block";
}

function hideAll()
{	


	//col = document.getElementsByTagName("div");
	for(i=1; i<5; i++)
	{

		d = document.getElementById("div" + i); 
		//d.runtimeStyle.display="none";	
		d.style.display="none";
	}

}