function addEvent( elm, evType, fn, useCapture ) {
	if( elm.addEventListener ) {
		elm.addEventListener( evType, fn, useCapture );
		return true;
	} else if( elm.attachEvent ) {
		var r = elm.attachEvent( 'on' + evType, fn );
		return r;
	} else {
		elm[ 'on' + evType ] = fn;
	}
}

// activate drop-down for submenu (li>ul) on nav-featured
var submenu_on = false,target_li;
make_drop_down_nav = function () {
	li_collection = document.getElementById('nav').getElementsByTagName('li');
	for( i = 0; i < li_collection.length; i++ ) {
		if( li_collection[i].getElementsByTagName("ul")[0] ) {
			target_li = li_collection[i];
			break;
		}
	}
	addEvent( target_li, 'mouseover', drop_down_nav, false );
	addEvent( target_li, 'mouseout',  drop_down_nav_hide, false );
	if( 'home' == document.getElementsByTagName('body')[0].id ) {
		target_li.getElementsByTagName("ul")[0].style.left = target_li.offsetLeft + 'px';
		target_li.getElementsByTagName("ul")[0].style.top = '2.7em';
	}
}

drop_down_nav = function() {
	submenu_on = true;
	target_li.getElementsByTagName("ul")[0].style.display = 'block';
}

drop_down_nav_hide = function() {
	submenu_on = false;
	target_li.getElementsByTagName("ul")[0].style.display = 'none';
}

addEvent( window, 'load', make_drop_down_nav, false );