homebtnon=new Image(123,35);                    homebtnoff=new Image(123,35)
  aboutbtnon=new Image(123,35);                   aboutbtnoff=new Image(123,35)
  linksbtnon=new Image(123,35);                   linksbtnoff=new Image(123,35)
  catalbtnon=new Image(123,35);                   catalbtnoff=new Image(123,35)
  alarmbtnon=new Image(123,35);                   alarmbtnoff=new Image(123,35)
  orderbtnon=new Image(123,35);                   orderbtnoff=new Image(123,35)
  emailbtnon=new Image(123,35);                   emailbtnoff=new Image(123,35)
  termsbtnon=new Image(123,35);                   termsbtnoff=new Image(123,35)
  homebtnon.src="images/homebtnon.gif";           homebtnoff.src="images/homebtnoff.gif"                  
  aboutbtnon.src="images/aboutbtnon.gif";         aboutbtnoff.src="images/aboutbtnoff.gif"
  linksbtnon.src="images/linksbtnon.gif";         linksbtnoff.src="images/linksbtnoff.gif"
  catalbtnon.src="images/cataloguebtnon.gif";     catalbtnoff.src="images/cataloguebtnoff.gif"
  alarmbtnon.src="images/alarmkitsbtnon.gif";     alarmbtnoff.src="images/alarmkitsbtnoff.gif"
  orderbtnon.src="images/orderbtnon.gif";         orderbtnoff.src="images/orderbtnoff.gif"
  emailbtnon.src="images/emailbtnon.gif";         emailbtnoff.src="images/emailbtnoff.gif"
  termsbtnon.src="images/termsbtnon.gif";         termsbtnoff.src="images/termsbtnoff.gif"