imagesArray = new Array();
	imagesArrayLength = 0;   // number of elements in the array (use a < when comparing)
	
	function setupImages(objectName, location, imageNormal, imageOver)
	{
	   if (document.images)
	   {
	      eval(objectName + "Normal = new Image()");
	      eval(objectName + "Normal.src = '" + location + imageNormal + "'");
	
	      eval(objectName + "Over = new Image()");
	      eval(objectName + "Over.src = '" + location + imageOver + "'");
	 
	      imagesArray[imagesArrayLength] = objectName;
	      imagesArrayLength++;
	      
	  }
	}
	
	function imgOver(imgName)
	{
	   if (document.images)
	   {
	      for (i=0; i<imagesArray.length; i++)
	      {
	         if(imgName == imagesArray[i])
	         {
	            document[imgName].src = eval(imgName + "Over.src");
	         }
	      }
	   }
	}
	
	function imgNormal(imgName)
	{
	   if (document.images)
	   {
	      for (i=0; i<document.images.length; i++)
	      {
	         if(imgName == imagesArray[i])
	         {
	            document[imgName].src = eval(imgName + "Normal.src");
	         }
	      }
	   }
	}


// begin menu rollover navigation
setupImages("tt1", "../../images/", "bt_contact.gif", "bta_contact.gif");
setupImages("tt2", "../../images/", "bt_moreinfo.gif", "bta_moreinfo.gif");
setupImages("tt3", "../../images/", "bt_tools.gif", "bta_tools.gif");
setupImages("tt4", "../../images/", "bt_newsletter.gif", "bta_newsletter.gif");
// end menu page rollover