function prepareLinks() {
	var show_ul = document.getElementById("show_ul"); //first link to make ul visible
	var hide_ul = document.getElementById("hide_ul"); //second link to make ul invisible

	
	show_ul.onclick = function() {
		return hide_ul.style.visibility = 'visible';
	}
	
	hide_ul.onclick = function() {
		return hide_ul.style.visibility = 'hidden';
	}

	//onclick="document.getElementById('hidden_ul').style.visibility='visible'"
	//onclick="document.getElementById('hidden_ul').style.visibility='hidden'"
	
	
}

//addLoadEvent(prepareLinks);


$(window).load(function() {
    prepareLinks();
});