function start() {
time();
window.setInterval("time()", 1000);
}

function time() {
var now = new Date();
hours = now.getHours();
minutes = now.getMinutes();
seconds = now.getSeconds();
thetime = (hours < 10) ? "0" + hours + ":" : hours + ":";
thetime += (minutes < 10) ? "0" + minutes + ":" : minutes + ":";
thetime += (seconds < 10) ? "0" + seconds : seconds;
element = document.getElementById("time");
element.innerHTML = thetime;
}