function manageTabs()
{
	var tabArray = ['', '', ''];
	var i = 0;
	var zIndex = 10;
		
	$$('a.tab').each(function(el) {												
	  
	  //fill array with tab elements
	  tabArray[i] = el.get('id');
	  i++;
	  
	  var targetID = "content" + el.get('name');
	  
	  if (el.get('name') != "ResultsSnrs")
	  {
	  	el.set('class', 'down');
	  }
	  else
	  {
		el.set('class', 'up');
		$(targetID).setStyle('z-index', zIndex); //bring to front
	  }
	  
	  el.addEvents({
				   
	    click: function() {
			
			targetID = "content" + el.get('name');
			zIndex++;
			
			//set all tabs to down
			for (j = 0; j < i; j++)
			{
				$(tabArray[j]).set('class', 'down');
			}
			
			if (el.get('class') == 'down')
			{
				el.set('class', 'up');
				$(targetID).setStyle('z-index', zIndex); //bring to front
			}
			else
			{
				el.set('class', 'down');
			}
		}
		
	  });
	
	});
}