function rollOver(obj) {
	var cat_main = document.getElementById(obj);
	
	cat_main.setAttribute("class","active");
	cat_main.setAttribute("className","active");
	
	return;
}
function rollOut(obj) {
	var cat_main = document.getElementById(obj);
	
	cat_main.setAttribute("class",null);
	cat_main.setAttribute("className",null);
	
	return;
}