var W3CDOM = (document.createElement && document.getElementsByTagName);

var mouseOvers = new Array();
var mouseOuts = new Array();

function init()
{
	if (!W3CDOM) return;

	var nav = document.getElementById('page');
	var imgs = nav.getElementsByTagName('img');

	var k = 0;

	for (var i=0;i<imgs.length;i++)
	{
		if(imgs[i].src.indexOf('_off') >= 0) {
			k++;
			imgs[i].onmouseover = mouseGoesOver;
			imgs[i].onmouseout = mouseGoesOut;
			mouseOuts[k] = new Image();
			mouseOuts[k].src = imgs[i].src;
			mouseOvers[k] = new Image();
			mouseOvers[k].src = imgs[i].src.replace(/(_off)/, "_on");
			imgs[i].number = k;
		}
	}
}

function mouseGoesOver()
{
	try {
		this.src = mouseOvers[this.number].src;
	} catch(e) { }
}

function mouseGoesOut()
{
	try {
		this.src = mouseOuts[this.number].src;
	} catch(e) { }
}

document.onload = init();