function rollOver_gif(_obj){
	var newFile = _obj.src.substring(0,_obj.src.length-4);
	newFile = newFile+"_2.gif";
	_obj.src = newFile;
}

function rollOut_gif(_obj){
	var newFile = _obj.src.substring(0,_obj.src.length-6);
	newFile = newFile+".gif";
	_obj.src = newFile;
}

function rollOver_jpg(_obj){
	var newFile = _obj.src.substring(0,_obj.src.length-4);
	newFile = newFile+"_2.jpg";
	_obj.src = newFile;
}

function rollOut_jpg(_obj){
	var newFile = _obj.src.substring(0,_obj.src.length-6);
	newFile = newFile+".jpg";
	_obj.src = newFile;
}