function swapImage(origImage){
	var orig = document.getElementById(origImage).src;
	var strSearch = orig.search(/-over.gif/);
	if(strSearch > 0){
		document.getElementById(origImage).src = orig.substring(0,orig.length-9)+".gif";
	}else{
		document.getElementById(origImage).src = orig.substring(0,orig.length-4)+"-over.gif";
	}
}