if (document.images)
   {
     img1on= new Image(146,65);
     img1on.src="/midsizebusiness/images/home/btn_support_on.gif";  
     img2on= new Image(146,65);
     img2on.src="/midsizebusiness/images/home/btn_newsletter_on.gif"; 
     img3on= new Image(146,65);
     img3on.src="/midsizebusiness/images/home/btn_casestudies_on.gif";  
     img4on= new Image(146,65);
     img4on.src="/midsizebusiness/images/home/btn_regionalinfo_on.gif"; 
     img5on= new Image(146,65);
     img5on.src="/midsizebusiness/images/home/btn_solutionfinder_on.gif";  
     img6on= new Image(146,65);
     img6on.src="/midsizebusiness/images/home/btn_events_on.gif"; 	 

     img1off= new Image(146,65);
     img1off.src="/midsizebusiness/images/home/btn_support.gif";
     img2off= new Image(146,65);
     img2off.src="/midsizebusiness/images/home/btn_newsletter.gif";
     img3off= new Image(146,65);
     img3off.src="/midsizebusiness/images/home/btn_casestudies.gif";
     img4off= new Image(146,65);
     img4off.src="/midsizebusiness/images/home/btn_regionalinfo.gif"; 
     img5off= new Image(146,65);
     img5off.src="/midsizebusiness/images/home/btn_solutionfinder.gif";
     img6off= new Image(146,65);
     img6off.src="/midsizebusiness/images/home/btn_events.gif"; 	 
   }

 
function on(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function off(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }