var btns = new Array();
for(i=0;i<8;i++){
	btns[i] = new Image();	
	btns[i].src = "site/images/buttons/main_menu/over/"+i+".gif";
	btns[i].original = "site/images/buttons/main_menu/standard/"+i+".gif";
}

function rollover (n){
	document.getElementById("b"+n).src = btns[n].src;	
}

function rollout (n){
	document.getElementById("b"+n).src = btns[n].original;	
}