var goodBrowser = false;
var version = parseInt( navigator.appVersion )
if( isNaN(version) ) version = 0
if( (navigator.appName.indexOf("Netscape") >= 0 && version >= 3) ||
    (navigator.appName.indexOf("Explorer") >= 0 && version >= 4))
goodBrowser = true;

if( goodBrowser )
{
  names = new Array();
  names[0] = "b1"; names[1] = "b2"; names[2] = "b3"; names[3] = "b4"; names[4] = "b5";
  hImg = new Array();
  nImg = new Array();
  for(i=0; i<names.length; i++)
  {
    hImg[i] = new Image();
    hImg[i].src = "/_img/menu/"+names[i]+"_on.gif";
    nImg[i] = new Image();
    nImg[i].src = "/_img/menu/"+names[i]+".gif";
  }
}


function h( i )
{
  if( goodBrowser )
    eval( "document."+names[i]+".src=hImg["+i+"].src" ); 
}
function n( i )
{
  if( goodBrowser )
    eval( "document."+names[i]+".src=nImg["+i+"].src" ); 
}

function DR_preloadImages() {
  if (document.images) {
    if (typeof document.DR == 'undefined'){
      document.DR = new Object();
    }
    document.DR.loadedImages = new Array();
    var argLength = DR_preloadImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      document.DR.loadedImages[arg] = new Image();
      document.DR.loadedImages[arg].src = DR_preloadImages.arguments[arg];
    }
  }
}