JS Confirm, false, return, not working

Question

this current piece of script to confirm whether a user wants to log out is not fully working in Safari on Mac.

function log_out()
{
    ht = document.getElementsByTagName("html");
    ht[0].style.filter = "progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)";
    if (confirm('Are you sure you want to log out?'))
    {

        return true;
    }
    else
    {
        ht[0].style.filter = "";
                return false;
    }
}

It works when the user confirm they want to logout, Ok, but when the user clicks cancel, they are still logged out.

Any ideas?

Thanks in advance!

Answer 1

Put the return instruction in front of the log_out call

<a class="rnavtab" href="?do=logout" onclick="return log_out()">Log out</a>