root/cemail/cemail_user.js

var cg = new CemailGroup;
var global_timer = null;
function initCemail() {
    cg.add(document.getElementById('cemail_input'));
}

function onCheckButton() {
    cg.check();
    global_timer = setInterval("check()", 150);
}

function check() {
    switch(cg.correct) {
        case 0:
            document.getElementById("message").innerHTML = "неправильный адрес";
            clearTimeout(global_timer);
        break;
        case 1:
            document.getElementById("message").innerHTML = "правильный адрес";
            clearTimeout(global_timer);    
        break;
        case 2:
            document.getElementById("message").innerHTML = "проверка...";
        break;
    }
}