if (document.images) {
    homeoff = new Image();
    homeoff.src  = 'images/nav_01.gif';
    homeon = new Image();
    homeon.src = 'images/nav_over_01.gif';
}
if (document.images) {
    biographyoff = new Image();
    biographyoff.src  = 'images/nav_02.gif';
    biographyon = new Image();
    biographyon.src = 'images/nav_over_02.gif';
}
if (document.images) {
	 ridersoff = new Image();
	 ridersoff.src  = 'images/nav_03.gif';
	 riderson = new Image();
	 riderson.src = 'images/nav_over_03.gif';
}
if (document.images) {
   informationoff = new Image();
   informationoff.src  = 'images/nav_04.gif';
   informationon = new Image();
   informationon.src = 'images/nav_over_04.gif';
}
if (document.images) {
    linksoff = new Image();
    linksoff.src  = 'images/nav_05.gif';
    linkson = new Image();
    linkson.src = 'images/nav_over_05.gif';
}
function change(image,ext) {
    if (document.images)
        if(document.images[image]){document.images[image].src = eval(image + ext + ".src");}
}
 function MM_preloadImages() { //v3.0
 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
  var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
   }