Question

I’m trying to build a form which submits a URL which contains a lon/lat that has been passed over from Google Maps. I have managed to get it so the lon/lat is passed into input fields in the form, how would I go about using these values dynamically in the post URL, i.e.:

action="search.asp?[lon][lat]

Answer 1

Using javascript you can change the action attribute of the form. So, create a form..

<form name="myForm">
  <input type="hidden" name="lon" value="123" />
  <input type="hidden" name="lat" value="321" />
  ...
  <button onclick="setAction();">Submit</button>
</form>

Then in the head of the page add the setAction function..

<script type="text/javascript">
  function setAction()
  {
    var lon = document.myForm.lon.value;
    var lat = document.myForm.lat.value;

    document.myForm.action = "search.php?["+lat+"]["+lon+"]"';
    document.myForm.submit();
  }
</script>

Hope this helps, it’s how I have done this in the past!