// JavaScript Document
function addMouseOver() {
	if(!document.getElementsByTagName)
		return;
		
	var images = document.getElementsByTagName('IMG');
	
	for(var i=0; i < images.length; i++)
		if(images[i].className == 'portfolio') {
			images[i].onmouseover = showColor;
			images[i].onmouseout = hideColor;
		}
}

function showColor() {
	this.src = this.src.substr(0, this.src.length-7) + '.jpg';
}

function hideColor() {
	this.src = this.src.substr(0, this.src.length-4) + '_bw.jpg';
}