function init()
{
	initMenu();
}

function initMenu()
{
	var items = document.getElementById('menu_items');
	var links = items.getElementsByTagName('a');
	
	for (i = 0; i < links.length; i++) {
		var img = links[i].getElementsByTagName('img')[0];
		// no rollover for education and lifestyle images
		if (img.src.indexOf('education.gif') > 0) continue;
		else if (img.src.indexOf('lifestyle.gif') > 0) continue;
		img.onmouseout = imgMouseOut;
		img.onmouseover = imgMouseOver;
		var on = new Image();
		on.src = img.src.replace('.gif','_on.gif');
	}
}

function imgMouseOver()
{
	if (this.src.indexOf('_on') > 0) return;
	// add '_on'
	this.src = this.src.replace('.gif','_on.gif');
}

function imgMouseOut()
{
	if (this.src.indexOf('_on') > 0) {
		// splice '_on'
		this.src = this.src.replace('_on.gif','.gif');
	}
}