var isDOM=document.getElementById?1:0;
var isIE=document.all?1:0;
var isNS4=navigator.appName=='Netscape'&&!isDOM?1:0;

function getRef(i, p) {
	p = !p ? document : p.navigator ? p.document:p;
	return isIE ? p.all[i]:isDOM ? (p.getElementById ? p : p.ownerDocument ).getElementById(i) : isNS4 ? p.layers[i] : null;
}



/*/ MENU /*/
function rollover(obj_id){
	var the_rollver = getRef('mnu'+obj_id);
	var the_submenu = getRef('sm'+obj_id);
	
	if(the_submenu.style.display == 'none' && the_rollver.className == 'mnu-off') {
			the_submenu.style.display = 'block';
			the_rollver.className = 'mnu-on';
			return false;
	}
	if(the_submenu.style.display == 'block' && the_rollver.className == 'mnu-on') {
			the_submenu.style.display = 'none';
			the_rollver.className = 'mnu-off';
			return false;
	}
}