/*
function toggle_visible(elName)
{
var el = document.getElementById(elName);
var isVisible = (el.style.visibility == "hidden") ? true : false;

el.style.visibility = isVisible ? "visible" : "hidden";
el.style.display = isVisible ? "block" : "none"; 
}*/
function toggle_visible(elName)
{
var el = document.getElementById(elName);
var isVisible = el.style.visibility;
	if(isVisible == "visible")
	{
	el.style.visibility = "hidden";
			el.style.display = "none";
	}
	else
	{
		el.style.visibility = "visible";
				el.style.display = "block";
	}
}

function hide_all()
{
var albumHide = document.getElementById('alb');
albumHide.style.visibility = "hidden";
albumHide.style.display = "none";   

var introHide = document.getElementById('intro');
introHide.style.visibility = "hidden";
introHide.style.display = "none";

var contactHide = document.getElementById('cont');
contactHide.style.visibility = "hidden";
contactHide.style.display = "none";   

var bioHide = document.getElementById('bio');
bioHide.style.visibility = "hidden";
bioHide.style.display = "none";

}