var img_folder = 'img/';
var img_prefix = 'menyv_';
var img_suffix = '.gif';
var img_highlight = '_over';

var menu_items = new Array();
menu_items[0] = 'hva_er';
menu_items[1] = 'leverandorer';
menu_items[2] = 'medlemmer';
menu_items[3] = 'kontakt_oss';
menu_items[4] = 'nyheter';

function menuPreload() {
	for (var i = 0; i < menu_items.length; i++) {
		var pre_img = new Image();
		pre_img.src = img_folder + img_prefix + menu_items[i] + img_highlight + img_suffix;
	}
}

function menuHighlight(id, state) {
	if (document.getElementById) {
		var img = document.getElementById(id);
	} else {
		var img = document.images[id];
	}
	
	if (state == 0) {
		img.src = img_folder + img_prefix + id + img_suffix;
	} else {
		img.src = img_folder + img_prefix + id + img_highlight + img_suffix;
	}
}

function extern(anchor) {
	window.open(anchor.href, 'Tradinghouse');
}


function toggleLayer(whichLayer)
{
if (document.getElementById)
{
// this is the way the standards work
var style2 = document.getElementById(whichLayer).style;
style2.display = style2.display? "":"block";
}
else if (document.all)
{
// this is the way old msie versions work
var style2 = document.all[whichLayer].style;
style2.display = style2.display? "":"block";
}
else if (document.layers)
{
// this is the way nn4 works
var style2 = document.layers[whichLayer].style;
style2.display = style2.display? "":"block";
}
}