Un Resolved Time Stamp Question

This is the last thing i need to work on my site…
thank you in advanced!!
ive tried using the following code with no avail. i can set an alert to give me the correct time but cannot set an element in the form to get sent to the email with the value….

The alert for ttlTime i belive gives me the correct time to the millisecond.. where im struggling is getting that value into the email sent on submission… or inserted into a form field.. like a hidden one… cant figure it out…

thank you!!

This is where im attempting to do this…

// Occurs just before submitting the form
function before_submit() {

alert(“test”);
var d = new Date();
var x = document.getElementById(“demo”);
var h = addZero(d.getHours(), 2);
var m = addZero(d.getMinutes(), 2);
var s = addZero(d.getSeconds(), 2);
var ms = addZero(d.getMilliseconds(), 3);
var ttlTime = h + “:” + m + “:” + s + “:” + ms;
x.value = ttlTime;
var toy = document.getElementsByClassName(“demo”);
toy.value = ttlTime;
alert(ttlTime);

function addZero(x,n) {
while (x.toString().length < n) {
x = “0” + x;
}
return x;
}

}