// Creates the topnav rollovers

if (document.images) {            
    img_on = new Image();      
    img_on.src = "/images/topnav_link_left.gif"; 

    img_off = new Image(); 
    img_off.src = "/images/topnav_link_left_over.gif"; 
}
        

function imgOn(imgName) {
  if (document.images) {
     pictureon = document.getElementById(imgName)
     pictureon.src = img_off.src;
  }
}


function imgOff(imgName) {
  if (document.images) {
     pictureon = document.getElementById(imgName)
     pictureon.src = img_on.src;
  }
}