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I read an article on "how to prevent users from submitting a form twice." at the url http://www.4guysfromrolla.com/webtech/100406-1.shtml
I was able to freeze the web page but was not able to unfreeze the web page. I am using PHP with javascript. Nothing happens when my code executes the "unfreeze" js function. I tested this js function and it only worked after I disabled the 2 php header() functions below. The JS unfreeze function just stops working with the php header functions enabled. There were no errors. Only the web page still freezes.
I hope someone can give me advice to help me solve this issue. Thanks in advance.
Below is my code in short version:
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- <?php
- ob_start();
- $hearingform = '
- <html>
- <head>
- <style type="text/css">
- .....
- </style>
- <div align="center" id="FreezePane" class="FreezePaneOff">
- <div id="InnerFreezePane" class="InnerFreezePane"> </div>
- </div>
- <script type="text/javascript">
- function FreezeScreen(msg) {
- scroll(0,0);
- var outerPane = document.getElementById("FreezePane");
- var innerPane = document.getElementById("InnerFreezePane");
- if (outerPane) outerPane.className = "FreezePaneOn";
- if (innerPane) innerPane.innerHTML = msg;
- }
- function unFreezeScreen() {
- var outerPane = document.getElementById("FreezePane");
- outerPane.className = "FreezePaneOff";
- }';
- //---------------------------------------------------------
- // some code to pull data from the database here...
- //---------------------------------------------------------
- // unfreeze the webpage
- echo '<script type="text/javascript">unFreezeScreen();</script>';
- /*send data to an excel file*/
- header("Content-type: application/csv");
- header("Content-Disposition: attachment; filename=$filename");
- echo $data;
- exit;
- } //END post IF
- print $hearingform;
- ob_flush();
- ?>
