if (document.images) {
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;
}

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


// MODIFY THE VARIABLES BETWEEN THESE COMMENTS
// Define the image swapping in the following format:
// preloadButtonSet(button_num,dark_button_src,light_button_src)
preloadButtonSet(1,"images/register.gif","images/register_on.gif");
preloadButtonSet(2,"images/links.gif","images/links_on.gif");
preloadButtonSet(3,"images/memory.gif","images/memory_on.gif");
preloadButtonSet(4,"images/classmates.gif","images/classmates_on.gif");
preloadButtonSet(5,"images/teachers.gif","images/teachers_on.gif");
preloadButtonSet(6,"images/home.gif","images/home_on.gif");
// MODIFY THE VARIABLES BETWEEN THESE COMMENTS


// function to pop a window
function popWin(lnk,w,h) {
  wlnk="newWin=window.open('"+lnk+"','NW','width="+w+",height="+h+",left=50,top=50,screenX=50,screenY=50')"
  eval(wlnk)
}

//  End -->