function initRollovers()
{
	if (!document.getElementById) return

	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++)
	{
		if (aImages[i].className == 'imgover')
		{
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aImages[i].onmouseover = function()
			{
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}
			
			aImages[i].onmouseout = function()
			{
				if (!sTempSrc)
				{
					sTempSrc = this.getAttribute('src').replace('_o'+ftype, ftype);
				}
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}
try
{
	window.addEventListener("load",initRollovers,false);
}
catch(e)
{
	window.attachEvent("onload",initRollovers);
}