script called when it is not needed

[stockton]

I have the following code in a html page and I need to know how to code the

line starting <a href="events.php"....... to get it to work rather than call the onclick="submit_click() on the line above.

The submit_click is obviously a JavaScript function that I do not want to run when the Back button is clicked.

<input type=button value="Update" onclick="submit_click()">
<a href="events.php?EventID=0"><BUTTON TYPE="submit">Back</BUTTON></a>

[Ken2k7]

Why can't you just remove the onclick="submit_click()" part? if you're changing it to a link, it'll have the same result.

[stockton]

Please tell me more. How would you code it to still call submit_click at the appropriate time ie when the Update button is clicked?

[Ken2k7]

Well it does that already as you can see. The back button wouldn't trigger the JavaScript again. Does your PHP page redirect the user after it finishes its task? If so, then the back button goes back to the PHP page so it seems like the UPDATE button got ran again when really it didn't. An onclick function doesn't execute itself.

 

Can you explain more about the issue if the above-mentioned is not the case?

[stockton]

Yesterday I watched a user click the Back button only to end up getting the database updated.

Just as if they had clicked the Update button.

I checked the database before the click of the Back button & after and the record had been altered.

[Ken2k7]

Does your functionality work something like this -

 

1. Click update button.

2. Sends to some PHP file to update database.

3. Redirect the user.

 

?

[stockton]

Yes it does.

On on the other hand clicking the Back button should take them straight back to where they came from, the menu.

[Ken2k7]

No, it would take them back to the PHP page. o.O

 

Example -

1. I'm on index.php and I click submit.

2. The form redirect me to process.php that inserts data to the DB.

3. process.php then redirects me back to index.php

 

If I press the back button after #3, I go back to #2, which runs the script again!

[stockton]

It is not a matter of clicking Update & then clicking Back.

User either clicks Back or Update.