Problem with PHP + Javascript

[lawina]

Hello,

I have a problem with integrating javascript with my image upload PHP script.

I am trying to integrate the following code into my page,

function u(x){
	x = document.getElementById(x);
	x.disabled = true;
	x.value="Uploading.....";
}

The <form> looks like,

<form ENCTYPE="multipart/form-data" method="post" name="form1" action="upload.php" onsubmit="u('b')">

and the submit button looks like,

<input id="b" type="submit" name="submit" value="Upload Image">

As you can see there is nothing wrong with the javascript.

However it doesn't work - i couldn't figure out why untill i noticed that when removing the following lines from upload.php the javascript works,

$submit = isset ($_POST['submit']) ? $_POST['submit'] : NULL;

if ($submit)

I have limited knowledge about PHP scripting however it looks like the upload script (upload.php) does not recognize the submit data after adding the javascript.

Could someone please help me with to solve this problem.

Thank you in advance.

lawina

PS: Server is running PHP 4.4.1

[AIS4U]

lawina:

Well, I'm certainly not an expert in the use of Java Script with PHP, but I do know that Java Script is a client Side technology and PHP is Server Side. Therefore, there are often times problems when trying to incorporate the two.

You might take a look at this link.

http://www.sitepoint.com/blogs/2004/08/30/crouching-javascript-hidden-php-1/

Good Luck

[Weedpacket]

Disabled form fields are not included in the submitted form. So once the submit button is disabled, there is no $_POST['submit'].

http://www.w3.org/TR/html4/interact/forms.html#h-17.12.1

Since this is a file upload form, instead of just checking to see if the submit button was clicked, check to see if a file was uploaded.