Drop_down and some_function()

[eluser]phpuser[/eluser]
Hello,

I'm using the following code to show a dropdown into a form :

Code:

$js = 'id="status" onChange="some_function();" class="" style="width:90px"';                              
echo form_dropdown('status', $status,$list['status'],$js);

But I don't know where to put the some_function() method in order to get the selected index into the dropdown and update my database automatically when the dropdown has been changed.

Anyone can help me ?

Thanks !
Joseph