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

var galleryOvers = new Array();


window.onload = init;

function init()
{
	if (!W3CDOM) return;	
	var gnav = document.getElementById('thumbs');
	var gimgs = gnav.getElementsByTagName('img');
	for (var i=0;i<gimgs.length;i++)
	{
		gimgs[i].onmouseover = updateDetail;
	
		var gsuffix = gimgs[i].src.substring(gimgs[i].src.lastIndexOf('.'));

		galleryOvers[i] = new Image();
		galleryOvers[i].src = gimgs[i].src.substring(0,gimgs[i].src.lastIndexOf('.')) + "_large" + gsuffix;
		gimgs[i].number = i;
	}
}


function updateDetail()
{
	var target = document.getElementById('largeImage');
	target.src = galleryOvers[this.number].src;
}