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

	// Banner 1

	var myBanner1 = new BannerRotator();

	myBanner1.add('', 'layout/header1.jpg');
	myBanner1.add('', 'layout/header2.jpg');
	myBanner1.add('', 'layout/header3.jpg');
	myBanner1.add('', 'layout/header4.jpg');
	myBanner1.add('', 'layout/header5.jpg');
	myBanner1.add('', 'layout/header6.jpg');
	myBanner1.add('', 'layout/header7.jpg');
		
	myBanner1.timer = 5;// 5 secs between images
	myBanner1.bannerNum = -1;// randomise banner
	
	// Set-up display

	addLoadEvent(function(){
	  myBanner1.bind('banner1');// match to ID of element.
	  myBanner1.startTimer();
	});