function show_menu(m) {
	document.getElementById('item_' + m).className = "item_selected";
	document.getElementById('submenu_' + m).style.display = "block";	
}

function hide_menu(m) {
	document.getElementById('item_' + m).className = "item";
	document.getElementById('submenu_' + m).style.display = "none";	
}

var img_cache = new Object();
var this_page = ""; //current menu item (mN)

function parse_images(tag_type) {

	function on_mouseout() {
		this.src = this.rootsrc;
	}
	
	function return_false() {
		return false;
	}
	
	function on_mouseover() {
		this.src = this.hoversrc;
	}	
	
	if (document.getElementById) {
		var ar = document.getElementsByTagName(tag_type);
		for( var x = 0; ar[x]; x++ ) {
			var im = ar[x];
			if(im.getAttribute) im.hoversrc = im.getAttribute('hoversrc');
			if(im.hoversrc) {				
			
				im.rootsrc = im.src;				
				im.onmouseout = on_mouseout;
				
				if(!img_cache[im.hoversrc]) {
					img_cache[im.hoversrc] = new Image();
					img_cache[im.hoversrc].src = im.hoversrc;
				}
				
				im.onmouseover = on_mouseover;
				
			}
		}
	}		
}