function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
nav_getstartpen_over = newImage("images/nav/nav_getstartpen_over.gif");
nav_complipen_over = newImage("images/nav/nav_complipen_over.gif");
nav_member_over = newImage("images/nav/nav_member_over.gif");
nav_awardpen_over = newImage("images/nav/nav_awardpen_over.gif");
nav_reportcardpen_over = newImage("images/nav/nav_reportcardpen_over.gif");
nav_contactpen_over = newImage("images/nav/nav_contactpen_over.gif");
nav_questionpen_over = newImage("images/nav/nav_questionpen_over.gif");
preloadFlag = true;
}
}