javascript alert before php code

Question

page:content display.php

<td width="100"><a onclick="return confirmSubmit()" href="delete.php?id=<?php echo $row['id']; ?>&table=labour_details&return=content_display.php"><img src="../images/delete.png" border="0" alt="delete"></a></td>

page:delete.php

if(isset($_GET['id']) && isset($_GET['table']))
    {
        $id=$_GET['id'];
        $tablename=$_GET['table'];
        $return=$_GET['return'];




        if($tablename=="labour_details")
        {
                    $sql=mysql_query("SELECT * FROM `labour_details` WHERE `id`='$id'");
                    $row_1=mysql_fetch_array($sql);
                    $labour_name= $row_1['labour_name'];

                    if($labour_name!="")
                    {
                        $str=mysql_query("DELETE FROM `labour_details` WHERE `id`='$id'");
                        if($str)
                        {
                            header("location:$return?msg=Record Deleted Successfully!&id=$id");
                        }else{
                            echo "Problem in deleting :";
                        }
                    }

        }

}

my problem is where to add alert so that before deleting record it show javascript massage if allow then it will delete record.

function confirmSubmit()
{
    var agree=confirm("Are you sure you wish to Delete this Entry?");
    if (agree)
        return true ;
    else
        return false ;
}

in confirmSubmit() if confirmSubmit() returns true then link href is followed if not it stays on the same page. — Robert
– Robert, Commented May 10, 2013 at 9:58
it should work as is: if the user doesn't confirm confirmSubmit(), the link is not followed and the delete.php link is not followed — Jan Turoň
– Jan Turoň, Commented May 10, 2013 at 9:59

Agrest · Accepted Answer · 2013-05-10 09:59:04Z

3

This line will show confirm dialogbox before redirect.

<a onclick="return confirm('Are You sure?')">...</a>

answered May 10, 2013 at 9:59

Agrest

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Comments

Dale · Accepted Answer · 2013-05-10 10:01:52Z

1

First you need to create the confirmSubmit() function

<script>
function confirmSubmit()
{
    if (confirm('Are you sure you want to delete this?'))
    {
        return true;
    }
    return false;
}
</script>

Then you attach that to your A tag, as you have done..

<a href="..." onclick="return confirmSubmit();">blah</a>

answered May 10, 2013 at 10:01

Dale

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1 Comment

Robert Over a year ago

and there is no need to conditional statement just return confirm('Are you sure you want to delete this?') in function body :P

Andrei Bârsan · Accepted Answer · 2013-05-10 10:09:12Z

1

You're probably looking for confirm.

Then, the body of the confirmSubmit function would look something like:

function confirmSubmit() {
    return confirm ("Are you sure you want to do this?");    
}

This works due to how event handlers work in javascript. Confirm returns true when the user clicks OK and false when they click Cancel.

By returning a true/false value from an event handler function you tell the window whether to keep processing that event. Returning false (which happens when the user clicks Cancel) tells the browser to stop processing the event and not follow the link.

edited May 10, 2013 at 10:09

answered May 10, 2013 at 10:02

Andrei Bârsan

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Comments

user1450789 · Accepted Answer · 2013-05-10 10:02:24Z

0

<td width="100"><a onclick="confirmSubmit(id)"><img src="../images/delete.png" border="0" alt="delete"></a></td>




function confirmSubmit(delete_id)
{
var r=confirm("Are you sure you want to delete?");

if(r==true)
{
         window.location.href = "delete.php?id="+delete_id"; ?>&table=labour_details&return=content_display.php"
    }
}

answered May 10, 2013 at 10:02

user1450789

1 Comment

user1450789 Over a year ago

with my function you will surely get an alert box to confirm delete or not....... check it and try it out.....

Bastianon Massimo · Accepted Answer · 2013-05-10 10:03:21Z

0

<a onclick="return confirm('Are you sure?')" href="delete.php">delete</a>

answered May 10, 2013 at 10:03

Bastianon Massimo

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