var arrSwapImagesOver = new Array(10);
var iIndex;

	arrSwapImagesOver[0] = new Image();
	arrSwapImagesOver[0].src = "images/gotop_over.jpg";	

	function swapImage(currElement) 
	{
		if (currElement && currElement.src) {
			var path = currElement.src;
			
			if (path.indexOf("_over.") > 0) {
				currElement.src =  path.replace("_over", "");
			}
			else {
				var ext = path.substr(path.lastIndexOf('.'));
				currElement.src =  path.replace(ext, "_over" + ext);
			}
		}	
	}