ASP Form Fill-in

[fireplug41]

I have a form that has 2 sections. Shipping and Billing information. I have a checkbox for same information. I am trying to figure out how to autofill the Billing fields when they fill in the Shipping information.

[Twey]

I take it the forms are exactly the same? If so, give both forms a name (shipform and billform) and use:

<script type="text/javascript">
function cloneForm() {
  var s = document.forms['shipform'].elements,
    b = document.forms['billform'].elements;
  for(var i=0;i<s.length;i++) {
    b[i].value = s[i].value;
  }
}
</script>
<input type="checkbox" onclick="if(this.checked) cloneForm(); else document.getElementById('billform').reset();">

Note, however, that if the billing form has a different number of elements to the shipping form, or they're in different places, this will not work.

[fireplug41]

is there a way to do it if the fields are all in one form?

[Twey]

Oh, I see: missed that. Right.

<script type="text/javascript">
function cloneForm() {
  var s = document.forms['shipform'].elements,
    billingFormOffset = 10;  // Number of elements in the "billing" part of the form
  for(var i=0;i<billingFormOffset;i++) {
    s[i + billingFormOffset].value = s[i].value;
  }
}
</script>
<input type="checkbox" onclick="if(this.checked) cloneForm(); else document.getElementById('billform').reset();">

That should work. I haven't tested it yet.