var browser_ok = 0;
 if ((navigator.appName == 'Netscape') && (navigator.appVersion.substring(0,1)>="3") ||
     (navigator.appName == 'Microsoft Internet Explorer') && (navigator.appVersion.substring(0,1)>="4") ) {
  browser_ok = 1;
  }
  
if (browser_ok == 1) {
  // preload of images
  if ( document.images != null) {
  // hier alle Bilder einfügen
  home_n     = new Image( 50, 50); home_o     = new Image( 50, 50); home_n.src     = "home_n.gif";     home_o.src     = "home_o.gif";
  headlogo_n = new Image( 50, 50); headlogo_o = new Image( 50, 50); headlogo_n.src = "headlogo_n.gif"; headlogo_o.src = "headlogo_o.gif";
  serv_n     = new Image(120, 50); serv_o     = new Image(120, 50); serv_n.src     = "serv_n.gif";     serv_o.src     = "serv_o.gif";
  ride_n     = new Image(120, 50); ride_o     = new Image(120, 50); ride_n.src     = "ride_n.gif";     ride_o.src     = "ride_o.gif";
  news_n     = new Image(120, 50); news_o     = new Image(120, 50); news_n.src     = "news_n.gif";     news_o.src     = "news_o.gif";
  cont_n     = new Image(120, 50); cont_o     = new Image(120, 50); cont_n.src     = "cont_n.gif";     cont_o.src     = "cont_o.gif";
  jobs_n     = new Image(120, 50); jobs_o     = new Image(120, 50); jobs_n.src     = "jobs_n.gif";     jobs_o.src     = "jobs_o.gif";
  about_n    = new Image(120, 50); about_o    = new Image(120, 50); about_n.src    = "about_n.gif";    about_o.src    = "about_o.gif";
  };
};
function OverImg(dst) {
  if (browser_ok == 1) {
    if (document.images != null) {
      document.images[dst].src = eval(dst+"_o.src");
      return true;
    };
  };
}
function OutImg(dst) {
  if (browser_ok == 1) {
    window.status='';
    if (document.images != null) {
      document.images[dst].src = eval(dst+"_n.src");
      return true;
    };
  };
}