var glrparas = document.getElementsByTagName("span");

for (para in glrparas) {
    if (glrparas[para].id) {
        if (glrparas[para].id.substring(0,3) == "GLR") {
            eval("var " + glrparas[para].id + " = document.getElementById(\"" + glrparas[para].id +"\");");
        }
    }
}

function resetBackgrounds() {
    for (para in glrparas) {
        if (glrparas[para].id) {
            if (glrparas[para].id.substring(0,3) == "GLR") {
                glrparas[para].style.backgroundColor = '#ffffff';
            }
        }
    }
}

function changeIt(obj) {
    resetBackgrounds();
    obj.style.backgroundColor = '#CC9933'
}

function changeItAgain(obj) {
    obj.style.backgroundColor = '#ffffff';
}