function showObject(id) {
   document.getElementById(id).style.display = "block";
}

function hideObject(id) {
   document.getElementById(id).style.display = "none";
}


function changeSrc(obj,src) {
   obj.src = "images/" + src;
}


function toggleObject(id) {
   if (document.getElementById(id).style.display == "block")
   {
   	document.getElementById(id).style.display = "none";
   }else{
   
   	document.getElementById(id).style.display = "block";
   }
}

function addLoadEvent(func)
{
  var oldonload = window.onload;
  if (typeof window.onload != 'function')
  {
	window.onload = func;
  } else {
	window.onload = function()
		{
			if (oldonload)
			{
				oldonload();
			}
			
			func();
		}
  }
}



      
	//var fadeImages=new Array();
	
function initFader()
{
//	fadeImages = arr;
	var two = document.getElementById('banner2');
	two.FadeState = -2;
    setTimeout("bannerFade()", TimeToFade * 5);
}

function bannerFade()
{
	var one = document.getElementById('banner1');
	var two = document.getElementById('banner2');
	
/*
	fadeImages[0]="courses1.jpg";
	fadeImages[1]="courses2.jpg";
	fadeImages[2]="courses3.jpg";
*/
	
		current++;
		if (current == fadeImages.length)
			current = 0;
			//alert(one.src);
	if (on)
	{
		two.src = "images/" + fadeImages[current];
		on = false;
	}else{
		one.src = "images/" + fadeImages[current];
		on = true;
	}
	
			//alert(one.src);
		fade('banner2');
		fade('banner1');
    setTimeout("bannerFade()", TimeToFade * 5);
}

function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;
   
  if(element.FadeState == null)
  {
    if(element.style.opacity == null 
        || element.style.opacity == '' 
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }
  }
  
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime() + ",'" + eid + "')", 33);
  }  
}

function animateFade(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
  
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = ' 
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  element.style.opacity = newOpVal;
  element.style.filter = 'alpha(opacity = ' + (newOpVal*100) + ')';
  
  setTimeout("animateFade(" + curTick + ",'" + eid + "')", 33);
}

	var current=0;
	var on=true;
	
var TimeToFade = 1000.0;