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I don't remember the standard capabilities of HTML. I can advice you to use input type=text, button, select paced on another layer(div) and to show/hide that layer when ever you need.
here is a piece of code for the php part. I assume here that we have 3 option values and I have put a textbox to get the value for the input. The code in PHP goes like:
Code: Select all
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<form name="form1" method="post" action="put.php">
<input name="c1" type="text" id="c1">
<?php echo("<option>".$c1."</option>") ?>
<input type="submit" name="Submit" value="Submit">
Every time the user inputs a value in the textbox and then presses the button he gets a reload and update event.
Hope it helps,