Question

<form id="form1" name="form1" method="post" action="foo.php">

  sort by:
  <select>
  <option name="date">sort by date</option>
  <option name="name">sort by name</option>
  <option name="price">sort by price</option>
  </select>

</form>

What I want here is that when I select an option the action in the form will be automatically executed? so in short
what I select will be send in foo.php thru $_POST. I dont want input button to make the action executed.

Do I need Javascript to achieve this?
Can you show me code to do this?
if it needs javascript then how

Answer 1

You need javascript for that.

Although you should use unobtrusive javascript, the basic code looks something like:

<select onChange="document.forms['form1'].submit();">

You attach an event handler to the change event and have it submit the form.