how to do delete confirmation

[scorpioy]

I have a table that in front of every row there is a checkbox, if any rows are checked and delete submit button is clicked, checked rows will be deleted. I'm trying to make a confirmation from the user before the delete action, but I couldn't make it work.

Here is what I did:

I put a JavaScript function Submit()in the form:

<form action="Posting.php"  method="post"  onclick=Submit(); >  

....
<input type="submit" name="submit_del" value="Delete selected" >
</form>

where Submit() has something like this:

var con = confirm("Do you want to make the deletion?");
if(con=='true')
{
window.open('Posting.php','My Posting');
....
}

On the top of the page I also have something like this:

if($_POST['submit_del]=="Delete selected")
{  ....   }

Inside of if statement, it is the mysql code to actually delete the rows.

Even the user answers no for that 'confirm()', those checked rows still get deleted. I know the reason is that the code 'if($POST['submit_del]=="Delete selected")' will always get executed because the delete button is clicked. I tried to only create or direct to the page Posting.php in the JavaScript. It's not working, and I'm afraid that $POST['submit_del] won't be set if only JavaScript is used.

In short, my question is how to make a confirmation (its better to do this at client side) and then use PHP to do what is required after clicking a button if the confirmation is affirmative.

Thanks.

[rachel2004]

Is there a strong reason for doing it client side? If not, you could do it all server side with the following flow:

1. user makes selection on form of records to delete.

2. form gets sent to a PHP script to parse the record ID and present the user with a "continue" button to go on and delete the record or a "cancel" button to get redirected to another page.

3. if user clicks "continue" a PHP script performs the record deletion from the db.

Doing it server side minimizes any problems with browser incompatibilities, which you probably want to avoid if you're getting into record deletions.

[scorpioy]

Thanks. I thought the reason of doing the confirmation on client-side is to save the effort of server, but now I guess the reason to prevent incompatable browsers would be stronger than that. So probably I should do it on server-side.

[scorpioy]

I have many forms and different delete buttons in the page. After deletion, it stay the same reloaded page. I'm not sure how to pass $_POST through an intermediate page that does the confirmation.

Could someone give me some example that passes $POST from page 1 to page 2, and then passes $POST back to page 1 ?

Thanks.