var pages={
	aboutus:['ourphilosophy','ourstaff','ourclients'],
	portfolio:['peruvianconnection','prosperosbookstore','mo-afp','sshwlaw','2nightinkansascity'],
	resources:['links','glossary','email'],
	services:['web','hosting','printing','graphics','political']
}

var file=location.pathname.lastIndexOf('.')==-1?'index':location.pathname.substring(location.pathname.lastIndexOf('/')+1,location.pathname.lastIndexOf('.'));

if(document.images)
{
	var pics=pages[file]; 
	for(i in pics)
	{
		var name=pics[i];
		pics[i]=new Image();
		pics[i].src="./images/"+name+"_gray.jpg"; 
	}
}

function changeImages()
{
	if(document.images)
		document[changeImages.arguments[0]].src=changeImages.arguments[1];
}