function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		Img01 = newImage("img/menu-about-over.png");
		Img02 = newImage("img/menu-news-over.png");
		Img03 = newImage("img/menu-services-over.png");
		Img04 = newImage("img/menu-certificat-over.png");
		Img05 = newImage("img/menu-news-over.png");
		Img06 = newImage("img/menu-products-over.png");
		Img07 = newImage("img/submenu-back-current.png");
		preloadFlag = true;
	}
}

function shh(a)
{
	var mm = document.getElementById(a);
	if(mm.style.display==null | mm.style.display=='block')
	{
		mm.style.display = 'none';
	}else{
		mm.style.display = 'block';
	}
}