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var W3CDOM = (document.createElement && document.getElementsByTagName);

var mouseOvers = new Array();
var mouseOuts = new Array();

window.onload = init;

function init()
{
	if (!W3CDOM) return;
	var subnav = document.getElementById('what');
	if(subnav){
		// init 'what we do' sub menu	
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	var nav = document.getElementById('nav');
	initRollovers(nav.getElementsByTagName('img'));
	
}

function initRollovers(imgs){
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	var n = mouseOvers.length;
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			imgs[i].number = n+i;
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}

function mouseGoesOver(){ this.src = mouseOvers[this.number].src; }
function mouseGoesOut(){ this.src = mouseOuts[this.number].src; }
//-->