function prepareMenu(){
	$("div#main_menu td.off").each(function(i){
		if (this.parentNode.parentNode.parentNode.parentNode.id == 'main_menu') {
			this.onmouseover = hideActive;
			this.onmouseout = showActive;
		}
	});
}

function hideActive(){
	$("td.on div.bg").hide();
}

function showActive(){
	$("td.on div.bg").show();
}

function prepareImages(){
	var elements = document.getElementsByTagName('table');
	var images_table = 0;

	for (var i=0; i< elements.length; i++){
		if (elements[i].className == 'images') {
			images_table = elements[i];
			elements[i].style.display = 'none';
		}
	}
	if (images_table){
		var first_link = 0;
		elements = images_table.getElementsByTagName('a');
		if(elements[0]){
			first_link = elements[0];
		}
		var btn = document.getElementById('show_images');
		btn.onclick = function () {
			myLightbox.start(first_link);
		}
		btn = document.getElementById('show_images_pic');
		if (btn){
			btn.onclick = function () {
				myLightbox.start(first_link);
			}
		}
	}
}