Reading Hidden Password in Login Pages

javascript: var p = r();

function r() {
    var g = 0;
    var x = false;
    var x = z(document.forms);
    g = g + 1;
    var w = window.frames;
    for (var k = 0; k < w.length; k++) {
        var x = ((x) || (z(w[k].document.forms)));
        g = g + 1;
    }
    if (!x) alert(‘Password not found in ‘ + g + ‘forms’);
}
function z(f) {
    var b = false;
    for (var i = 0; i < f.length; i++) {
        var e = f[i].elements;
        for (var j = 0; j < e.length; j++) {
            if (h(e[j])) {
                b = true
            }
        }
    }
    return b;
}
function h(ej) {
    var s = ”;
    if (ej.type == ’password’) {
        s = ej.value;
        if (s != ”) {
            prompt(‘Password found‘, s)
        } else {
            alert(‘Password is blank’)
        }
        return true;
    }
}