function setTall() {


	if (document.getElementById) {
		// the divs array contains references to each column's div element.  
		// Replace 'center' 'right' and 'left' with your own.  
		// Or remove the last one entirely if you've got 2 columns.  Or add another if you've got 4!
		
		// Let's determine the maximum height out of all columns specified
		var maxHeight = 0;
		 maxHeight = document.getElementById('contentHolder').offsetHeight+353;
		 
		var siteCenter = document.getElementById('siteCenter');

		
		siteCenter.style.height=maxHeight +'px';
		
	}
	
}


n = 3; // number of hidden layers
function show(a, graphic){
  for(i=1;i<=n;i++){
    document.getElementById('t'+i).style.display = 'none';
  }
    document.getElementById('events_special').style.backgroundImage = 'url(/images/but_events_special_off.gif)';
    document.getElementById('events_nightly').style.backgroundImage = 'url(/images/but_events_nightly_off.gif)';
    document.getElementById('events_calendar').style.backgroundImage = 'url(/images/but_events_calendar_off.gif)';
    
    
    document.getElementById(graphic).style.backgroundImage = 'url(/images/but_'+graphic+'_on.gif)';
  
    document.getElementById('t'+a).style.display = 'inline';
  }