if (document.images)
    {

      button01=new Image();
      button02=new Image();
      button03=new Image();
      button04=new Image();
      button05=new Image();
      button06=new Image();
      button07=new Image();
      button08=new Image();
      button09=new Image();
      button10=new Image();
      button11=new Image();
      button12=new Image();
      button13=new Image();

      button01.src="imx/header_mouseover.gif";
      button02.src="imx/header_mouseover_book.gif";
      button03.src="imx/header_mouseover_hold.gif";
      button04.src="imx/header_mouseover_me.gif";
      button05.src="imx/header_mouseover_skint.gif";
      button06.src="imx/butt_books_f.gif";
      button07.src="imx/butt_books_n.gif";
      button08.src="imx/butt_me_f.gif";
      button09.src="imx/butt_me_n.gif";
      button10.src="imx/butt_sk_f.gif";
      button11.src="imx/butt_sk_n.gif";
      button12.src="imx/butt_skint_f.gif";
      button13.src="imx/butt_skint_n.gif";

    }

function display(num)
       { if (document.images)
            {
              if (num=="1") document.n1.src=button03.src;
              if (num=="1") document.n2.src=button11.src;
              if (num=="2") document.n1.src=button01.src;
              if (num=="2") document.n2.src=button10.src;
              if (num=="3") document.n1.src=button05.src;
              if (num=="3") document.n3.src=button13.src;
              if (num=="4") document.n1.src=button01.src;
              if (num=="4") document.n3.src=button12.src;
              if (num=="5") document.n1.src=button04.src;
              if (num=="5") document.n4.src=button09.src;
              if (num=="6") document.n1.src=button01.src;
              if (num=="6") document.n4.src=button08.src;
              if (num=="7") document.n1.src=button02.src;
              if (num=="7") document.n5.src=button07.src;
              if (num=="8") document.n1.src=button01.src;
              if (num=="8") document.n5.src=button06.src;
            }
        }