var ImageArr1 = new Array("images/headerPics/image298.jpg", "images/headerPics/students1.jpg", "images/headerPics/students2.jpg", 
  			"images/headerPics/students3.jpg", "images/headerPics/staff1.jpg");
  var ImageHolder1 = document.getElementById('Rotating1');

  function RotateImages(whichHolder,Start)
  {
  	var a = eval("ImageArr"+whichHolder);
  	var b = eval("ImageHolder"+whichHolder);
  	if(Start>=a.length)

  		Start=0;
  	b.src = a[Start];
  	window.setTimeout("RotateImages("+whichHolder+","+(Math.floor(Math.random()*+6))+")",1100);
  }

  RotateImages(1,0);