Question

I want to be able to have a text box on a page where php writes into and javascript read from

I saw this solution
How can I set the value of a textbox through PHP?

use it and I manage to write the value on the textbox using this command

<input type=\"text\" name=\"txtFromPHP\" value=\"" .$row['id'] . "\">

but when I access the textbox usng this

var str = document.getElementById('txtFromPHP').value;

I get error

document.getElementById("txtFromPHP") is null

Just maybe it’s relevant, my html page where textbox is placed is a modified version of Ajax Database example found at http://www.w3schools.com/PHP/php_ajax_database.asp

Thanks

Answer 1

You need to set the element ID as follows

<input type=\"text\" id=\"txtFromPHP\" name=\"txtFromPHP\" value=\"" .$row['id'] . "\">

In your example you only set the name of the element txtFromPHP and did not set an ID