How to check availability of an ID in same page?
<p>To be specific, I want to make code like Yahoo's Registration (Yahoo ID - Check Availability) checking the availability. The problem here is I need to use PHP to connect, get, and search/verify if the entered value in the textbox is unique.</p>

<p>I tried passing a JavaScript value to a PHP variable, but based on my research, doing this isn't possible, so I need another possible solution to get the value of the textbox and set it to a PHP variable.</p>

<p>Thank you in advance.</p>
