if (document.images) {



  nav_side1_1on = new Image();

  nav_side1_1on.src = "_images/nav_side1_1over.gif";

  nav_side1_2on = new Image();

  nav_side1_2on.src = "_images/nav_side1_2over.gif"; 

  nav_side1_3on = new Image();

  nav_side1_3on.src = "_images/nav_side1_3over.gif";

  nav_side1_4on = new Image();

  nav_side1_4on.src = "_images/nav_side1_4over.gif";

  

  nav_side1_1off = new Image();

  nav_side1_1off.src = "_images/nav_side1_1off.gif";

  nav_side1_2off = new Image();

  nav_side1_2off.src = "_images/nav_side1_2off.gif";

  nav_side1_3off = new Image();

  nav_side1_3off.src = "_images/nav_side1_3off.gif";

  nav_side1_4off = new Image();

  nav_side1_4off.src = "_images/nav_side1_4off.gif";



  

}



function changeImages() {

  if (document.images) {

    for (var i=0; i<changeImages.arguments.length; i+=2) {

      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");

    }

  }

}