// Main menu buttons
homeon           = new Image();
homeon.src       = "buttons/home_o1.jpg";
homeoff          = new Image();
homeoff.src      = "buttons/home_y1.jpg";
scienceon        = new Image();
scienceon.src    = "buttons/science_o1.jpg";
scienceoff       = new Image();
scienceoff.src   = "buttons/science_y1.jpg";
businesson       = new Image();
businesson.src   = "buttons/business_o1.jpg";
businessoff      = new Image();
businessoff.src  = "buttons/business_y1.jpg";
codingon         = new Image();
codingon.src     = "buttons/coding_o1.jpg";
codingoff        = new Image();
codingoff.src    = "buttons/coding_y1.jpg";
otheron          = new Image();
otheron.src      = "buttons/other_o1.jpg";
otheroff         = new Image();
otheroff.src     = "buttons/other_y1.jpg";
ecommerceon      = new Image();
ecommerceon.src  = "buttons/ecommerce_o1.jpg";
ecommerceoff     = new Image();
ecommerceoff.src = "buttons/ecommerce_y1.jpg";

// Sub-menu arrows
arrowright1on      = new Image();
arrowright1on.src  = "buttons/arrowright_blue.gif";
arrowright2on      = new Image();
arrowright2on.src  = "buttons/arrowright_blue.gif";
arrowright3on      = new Image();
arrowright3on.src  = "buttons/arrowright_blue.gif";
arrowright4on      = new Image();
arrowright4on.src  = "buttons/arrowright_blue.gif";
arrowright5on      = new Image();
arrowright5on.src  = "buttons/arrowright_blue.gif";
arrowright6on      = new Image();
arrowright6on.src  = "buttons/arrowright_blue.gif";
arrowright7on      = new Image();
arrowright7on.src  = "buttons/arrowright_blue.gif";
arrowright8on      = new Image();
arrowright8on.src  = "buttons/arrowright_blue.gif";
arrowright1off     = new Image();
arrowright1off.src = "buttons/arrowright_red.gif";
arrowright2off     = new Image();
arrowright2off.src = "buttons/arrowright_red.gif";
arrowright3off     = new Image();
arrowright3off.src = "buttons/arrowright_red.gif";
arrowright4off     = new Image();
arrowright4off.src = "buttons/arrowright_red.gif";
arrowright5off     = new Image();
arrowright5off.src = "buttons/arrowright_red.gif";
arrowright6off     = new Image();
arrowright6off.src = "buttons/arrowright_red.gif";
arrowright7off     = new Image();
arrowright7off.src = "buttons/arrowright_red.gif";
arrowright8off     = new Image();
arrowright8off.src = "buttons/arrowright_red.gif";

arrowleft1on      = new Image();
arrowleft1on.src  = "buttons/arrowleft_blue.gif";
arrowleft1off     = new Image();
arrowleft1off.src = "buttons/arrowleft_red.gif";

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

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