window.onload = function() {
	
	$S('a.navbutton').action({
		onmouseover: function() {
			// actual mouseover action
			this.firstChild.src = this.firstChild.src.replace(/.jpg/g,'_f2.jpg');
			this.firstChild.src = this.firstChild.src.replace(/.gif/g,'_f2.gif');
		
		},
		onmouseout: function() {
			// actual mouseover action
			this.firstChild.src = this.firstChild.src.replace(/_f2.jpg/g,'.jpg');
			this.firstChild.src = this.firstChild.src.replace(/_f2.gif/g,'.gif');
		}
	});

};



function openPopup(url, width, height, winname)
	{
		var trails="width="+ width +",height="+ height +",toolbar=no,directories=no,status=no,scrollbars=yes,resize=no,menubar=no";
		newWindow=window.open(url,winname,trails);              
	}