var ctImg, ctImgH, aImg, aImgH, sImg, sImgH, clImg, clImgH;

ctImg = new Image();	ctImgH = new Image();
aImg = new Image();		aImgH = new Image();
sImg = new Image();		sImgH = new Image();
clImg = new Image();	clImgH = new Image();

ctImg.src = "/img/nav_contact.gif";
ctImgH.src = "/img/nav_contact_h.gif";
aImg.src = "/img/nav_about.gif";
aImgH.src = "/img/nav_about_h.gif";
sImg.src = "/img/nav_schedule.gif";
sImgH.src = "/img/nav_schedule_h.gif";
clImg.src = "/img/nav_classes.gif";
clImgH.src = "/img/nav_classes_h.gif";



function showPaint(imgName)
{
  if(imgName == "classes")
  {
    document.classes.src = clImgH.src;
  }
  else if(imgName == "about")
  {
    document.about.src = aImgH.src;
  }
  else if(imgName == "schedule")
  {
    document.schedule.src = sImgH.src;
  }
  else if(imgName == "contact")
  {
    document.contact.src = ctImgH.src;
  }
}

function losePaint(imgName)
{
  if(imgName == "classes")
  {
    document.classes.src = clImg.src;
  }
  else if(imgName == "about")
  {
    document.about.src = aImg.src;
  }
  else if(imgName == "schedule")
  {
    document.schedule.src = sImg.src;
  }
  else if(imgName == "contact")
  {
    document.contact.src = ctImg.src;
  }
}