/***********************************************

* Random banner rotation script

* University of Surrey
* Matt Farrow | 14 February 2007

***********************************************/

  // This is the default path for banners. It can be overridden
  var bannerPath = 'http://portal.surrey.ac.uk/assets/images/';

  
  // This is the banner object constructor function
  function banner(src, alt){
    this.src = src;
	this.alt = alt;
	this.showBanner = showBanner;
	
    function showBanner(){
      document.write('<img src="' + bannerPath + src + '" alt="' + alt + '" />');
	  }
    }
	
  
  // This is a random number generator function
  function randomNumber(limit){
    return Math.floor(Math.random()*limit);
	}