function showhide(layer_ref) 
{
	var element = document.getElementById(layer_ref);
	
	element.style.display = "block";

	element.parentNode.onmouseover = function() 
	{
		document.getElementById(layer_ref).style.display = "block";	
		document.getElementById(layer_ref).style.height = "auto";		
	}
	element.parentNode.onmouseout = function() 
	{
		document.getElementById(layer_ref).style.display = "none";
		document.getElementById(layer_ref).style.height = 0;
	}
	return false;
}