function rollNav(name, toggle)
{
	var imgUrl = 'http://www.duet-weddings.com/images/'+ name;
	imgUrl += (toggle) ? '-over.gif' : '.gif';
	document.images[name].src = imgUrl;
}

var preloadedImages = Array();
var imageNames = [
'about',
'services',
'gallery',
'blog',
'press',
'contact'
];
function preloadNav()
{
	for (var i = 0; i < imageNames.length; i++)
	{
		var hp = new Image();
		hp.src = 'http://www.duet-weddings.com/images/nav-hp-'+ imageNames[i] +'-over.gif';
		var sub = new Image();
		sub.src = 'http://www.duet-weddings.com/images/nav-sub-'+ imageNames[i] +'-over.gif';
		preloadedImages.push( hp, sub );
	}
}
window.onload = preloadNav;