// out
  var btn_ot = new Array(2);
  var btnname_ot = new Array(2);
  btnname_ot[0]="images/up_arrow_ot.gif"
  btnname_ot[1]="images/dn_arrow_ot.gif"

  
  // over
  var btn_or = new Array(2);
  var btnname_or = new Array(2);
  btnname_or[0]="images/up_arrow_or.gif"
  btnname_or[1]="images/dn_arrow_or.gif"

  
  for (var i=0; i<2; i++) {
  	btn_ot[i] = new Image(); btn_ot[i].src = btnname_ot[i];
  	btn_or[i] = new Image(); btn_or[i].src = btnname_or[i];	
  }


function imageSwap(sImage, sNewImage) {
    document.images[sImage].src=eval(sNewImage+'.src');
}