<!--

var darkened_pics = new Array();
var lighted_pics = new Array();


function preloadButtonSet(num,dark,light) {
 darkened_pics[num] = new Image();
 darkened_pics[num].src = dark;
 lighted_pics[num] = new Image();
 lighted_pics[num].src = light;
}

preloadButtonSet(0,"images/aboutus_off.gif","images/aboutus_on.gif");
preloadButtonSet(1,"images/NGVconversions_off.gif","images/NGVconversions_on.gif");
preloadButtonSet(2,"images/NGVfuelsysdes_off.gif","images/NGVfuelsysdes_on.gif");
preloadButtonSet(3,"images/EVpartsandservices_off.gif","images/EVpartsandservices_on.gif");
preloadButtonSet(4,"images/customcoachwork_off.gif","images/customcoachwork_on.gif");
preloadButtonSet(5,"images/EVFAQ_off.gif","images/EVFAQ_on.gif");
preloadButtonSet(6,"images/EVlinks_off.gif","images/EVlinks_on.gif");
preloadButtonSet(7,"images/emailus_off.gif","images/emailus_on.gif");
preloadButtonSet(8,"images/aboutcleanfuels_off.gif","images/aboutcleanfuels_on.gif");

function lighten(num) {
 if (document.images)
  eval("document.button"+num+".src = lighted_pics["+num+"].src;");
 return false;
}
function darken(num) {
 if (document.images)
  eval("document.button"+num+".src = darkened_pics["+num+"].src;");
 return false;
}

//->