// JavaScript Document
var prev_layer = null;

function showhide(layer_ref) 
{
		
	var browserType;
	if (document.layers) {browserType = "nn4"}
	if (document.all) {browserType = "ie"}
		
	if (browserType=="ie")  				//IS IE 4 or 5 (or 6 beta)
	{
		//alert ("ie");
		//document.all.home.style.display = "none";
		if(prev_layer)
			eval("document.all."+prev_layer+".style.display = \"none\"");
		eval("document.all."+layer_ref+".style.display = \"block\"");
	}
	
	if (browserType=="nn4") 			 //IS NETSCAPE 4 or below
	{
		//alert("nn4");
		//document.layers["home"].display = none;
		if(prev_layer)
			document.layers[prev_layer].display = none;
		document.layers[layer_ref].display = block;
	}
	
	if (document.getElementById && !document.all) 
	{
		if(prev_layer)
			document.getElementById(prev_layer).style.display = 'none' ;
		maxwell_smart = document.getElementById(layer_ref);
		maxwell_smart.style.display = 'block';
	}
	
	prev_layer = layer_ref;
}