How to enter value on textbox using php and get it by javascript

Question

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

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

xyz · Accepted Answer · 2012-06-14 20:43:35Z

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

answered Jun 14, 2012 at 20:43

xyz

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Comments

user1299518 · Accepted Answer · 2012-06-14 20:44:33Z

1

change the "name" to "id" or have them both:

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

answered Jun 14, 2012 at 20:44

user1299518