// JavaScript Document
function halftone(id)
{
	document.getElementById(id).className = 'halftone';
}
function fulltone(id)
{
	document.getElementById(id).className = 'fulltone';
}
function imgSwapOver(id)
{
	document.getElementById(id).src = 'images/go_over.gif';		
}
function imgSwapOut(id)
{
	document.getElementById(id).src = 'images/go.gif';
}