var overIntroduction = new Image(), outIntroduction	= new Image() ;
      var overCUP			   = new Image(), outCUP			   = new Image() ;
      var overBoneTrade		= new Image(), outBoneTrade		= new Image() ;
      var overHOrigins		= new Image(), outHOrigins		   = new Image() ;
      var overResources    = new Image(), outResources      = new Image() ;


      overIntroduction.src = "amh_introduction.jpg" ;
      overCUP.src			   = "amh_cup.jpg" ;
      overBoneTrade.src		= "amh_bone_trade.jpg" ;
      overHOrigins.src		= "amh_horigins.jpg" ;
      overResources.src    = "amh_resources.jpg" ;

            
        // functions to rollover buttons
      function changeImage(toBeChanged, overImage, outImage)
         {
         outImage.src = toBeChanged.src ;
         toBeChanged.src = overImage.src ;
         }

      function setImage(toBeChanged, outImage)
	 		{
         toBeChanged.src = outImage.src ;
         }
 
        // function to open web page
      function openSite()
         {
         var site = window.document.collegesites.webpage ;
         var pageURL  = site.options[site.selectedIndex].value ;

         window.location.replace(pageURL) ;      
         }