window.onload = initShowHide;

function initShowHide() 
{
	var as = document.getElementById('header_links').getElementsByTagName('a');
	
	for(var i = 0; i < as.length; i++) 
	{
		as[i].onmouseover = 
		function() 
		{
			toggle(this.id.substring(5));
			return false;
		}
	}
}


function toggle(s)
{
	var divs = document.getElementById('header_mouseover').getElementsByTagName('div');
	
	for(var i = 0; i < divs.length; i++)
	{
		divs[i].style.display = "none";
	}
	
	document.getElementById(s).style.display = "block";
	
}