function mainRollover(obj, section){
	obj.src = "images/buttons/main_"+section+"_over.jpg";	
}
function mainRollout(obj, section){
	obj.src = "images/buttons/main_"+section+".jpg";
}
function subRollover(obj, section){
	obj.src = "images/buttons/sub_"+section+"_over.jpg";	
}
function subRollout(obj, section){
	obj.src = "images/buttons/sub_"+section+".jpg";
}
function tertRollover(obj, section){
	obj.src = "images/buttons/tert_"+section+"_over.jpg";	
}
function tertRollout(obj, section){
	obj.src = "images/buttons/tert_"+section+".jpg";
}