combine 3 form values into 1

[free man]

Hi,

I have a form where dob is generated using 3 select boxes, 1 for day, month and year. My output needs to be in the form dob=dd-mm-yyyy rather than day=dd, month=mm and year=yyyy.

It has been suggested that i do the following:

"On submit button click, use JS to create a hidden input (Q5) in the form and assign its value, then disable the day, month, and year fields so they are not submitted."

Does anyone know how to do this?

[Philip M]

You do not give much detail, but

<script type = "text/javascript">

function reformatDOB() {
var dd = document.myform.dayselectlist.value;
var mm = document.myform.monthselectlist.value;
var yy = document.myform.yearselectlist.value;

var Q5 = dd + "-" + mm + "-" + yy;

document.formname.dayselectlist.disabled = true;
document.formname.monthselectlist.disabled = true;
document.formname.yearselectlist.disabled = true;
}

</script>

"Chelsea have five or six injured players out at the moment, and if Ashley Cole is injured that makes it seven or eight." - Football commentator