Browser = false ;
if (((navigator.appName.charAt(0)=="N") && (navigator.appVersion.charAt(0)>=3)) || ((navigator.appName.charAt(0)=="M") && (navigator.appVersion.charAt(0)>=4))) {
    Browser = true;
    
   
    about_off= new Image();
    about_off.src = "images/nav/about_off.gif";
    about_over = new Image();
    about_over.src = "images/nav/about_over.gif";
    
    contact_off= new Image();
    contact_off.src = "images/nav/contact_off.gif";
    contact_over = new Image();
    contact_over.src = "images/nav/contact_over.gif";
    
    event_off= new Image();
    event_off.src = "images/nav/event_off.gif";
    event_over = new Image();
    event_over.src = "images/nav/event_over.gif";
    
    gallery_off= new Image();
    gallery_off.src = "images/nav/gallery_off.gif";
    gallery_over = new Image();
    gallery_over.src = "images/nav/gallery_over.gif";
    
    home_off= new Image();
    home_off.src = "images/nav/home_off.gif";
    home_over = new Image();
    home_over.src = "images/nav/home_over.gif";
    
    links_off= new Image();
    links_off.src = "images/nav/links_off.gif";
    links_over = new Image();
    links_over.src = "images/nav/links_over.gif";
    
    news_off= new Image();
    news_off.src = "images/nav/news_off.gif";
    news_over = new Image();
    news_over.src = "images/nav/news_over.gif";
    
    perf_off= new Image();
    perf_off.src = "images/nav/perf_off.gif";
    perf_over = new Image();
    perf_over.src = "images/nav/perf_over.gif";
    
    arrowl_off= new Image();
    arrowl_off.src = "images/arrowl_off.gif";
    arrowl_over = new Image();
    arrowl_over.src = "images/arrowl_over.gif";
    
    arrowr_off= new Image();
    arrowr_off.src = "images/arrowr_off.gif";
    arrowr_over = new Image();
    arrowr_over.src = "images/arrowr_over.gif";
   
    }    

function rollover(place, imgName) {
    if (Browser == true) {
        document[place].src =eval(imgName + ".src");
    }
}