check informatio with javascript

Anon

Hi, I want to make a form using php and javascript.
In the form, user need input the username, then the program will check the wheather the username is used by other or not though the mysql database after the user push the submit button, if it is used by other, then the alert window will be pop up and alert the user its name is used by others.

Can I make this script??

Anon

Not in javascript. (well, not in a sensible way)

Anon

You can't check the database with client side javascript, but you can check it with php and then use php to write the javascript code for the alert window. Something like this:

<?php
if ($found) // username is in database
$alert = 'onload=alert("Username found")';
else
$alert = "";
?>
<body <?php echo $alert;>>

Anon

Is it possible you can send the script to my email
lm3288@singnet.com.sg