imagea = new Image()
imagea.src="pics/menu1-a.gif"
imageaoff = new Image()
imageaoff.src="pics/menu1.gif"

imageb = new Image()
imageb.src="pics/menu2-a.gif"
imageboff = new Image()
imageboff.src="pics/menu2.gif"

imagec = new Image()
imagec.src="pics/menu3-a.gif"
imagecoff = new Image()
imagecoff.src="pics/menu3.gif"

imaged = new Image()
imaged.src="pics/menu4-a.gif"
imagedoff = new Image()
imagedoff.src="pics/menu4.gif"

imagee = new Image()
imagee.src="pics/menu5-a.gif"
imageeoff = new Image()
imageeoff.src="pics/menu5.gif"

function on(imgname, x, action)
{
if(action)
  {
   imgname.src = eval('image'+x).src
   }
   else
   {
   imgname.src = eval('image'+ x +'off').src
   }
}