var subNav = new Array('subNav1','subNav2','subNav4','subNav5','subNav6','subNav7','subNav8');

var disappearSet = 0;

function showSubNav(id)
{
	hideSubNav();
	if(disappearSet == 1)
	{
		clearTimeout(disappear);
	}
	document.getElementById(id).style.display = "block";
}

function hideSubNav()
{		
	for (i=0; i<subNav.length; ++i)
	{
		document.getElementById(subNav[i]).style.display = 'none';
	}
}

function stay()
{
	clearTimeout(disappear);
}

function leave()
{
	disappear = setTimeout("hideSubNav()",1500);
	disappearSet = 1;
}

function hide(y)
{
	for (i=1; i<y+1; ++i)
	{
		el = "panel"+i;
  		document.getElementById(el).style.display = 'none';
	}
}

var openPanel = 0;

function show(x,y)
{
	hide(y);
	openPanel = x;
	el = "panel"+x;
	document.getElementById(el).style.display = 'block';
	
	if (document.getElementById('more'+x) != null) {
		document.getElementById('more'+x).innerHTML = "<em>Close</em>";
	}
}


var images = new Array();
images[0] = 'http://www.instituteforspecialsurgery.com/images/promo/promo1.jpg';
images[1] = 'http://www.instituteforspecialsurgery.com/images/promo/promo2.jpg';
images[2] = 'http://www.instituteforspecialsurgery.com/images/promo/promo3.jpg';
images[3] = 'http://www.instituteforspecialsurgery.com/images/promo/promo4.jpg';
images[4] = 'http://www.instituteforspecialsurgery.com/images/promo/promo5.jpg';
var randomImageIndex = Math.floor(Math.random() * images.length);

function swapImage(x)
{
	document.getElementById('promoImage').src = images[x];
	if(randomImageIndex == (images.length)-1)
	{
		//alert(randomImageIndex);
		randomImageIndex = 0;
	}
	else
	{
		randomImageIndex = randomImageIndex+1;
	}
	setTimeout("swapImage("+randomImageIndex+")",3000);
}