window.addEvent('domready', function() {
	var myFx = new Fx.Tween("content", {duration: 1500} );
//Transitions the background color of the Element from black to red:

myFx.set('Tween', {duration: 'long'});
myFx.start('color', '#FFF', '#000');	




});

function showOrHide(id, list)
{
   document.getElementById('courses').style.display = 'block';
   if (document.getElementById) 
   {
      for (i=1; i<=list.length; i++)
      {
         document.getElementById(list[i-1]).style.display = 'none';
      }
      document.getElementById(id).style.display = 'block';
   }
}