Question

From my main app page, Default.aspx I am popping up another page with window.open.
On that page I have a home link as a HyperLink that calls a Javascript function.

<asp:HyperLink id="lnkHome" runat="server" meta:resourcekey="lnkHome" NavigateUrl = " " onclick = "javascript:performRedirect()">

I am checking if the parent window is still running and if it is just closing this window, If not then redirecting back to the main window.

function performRedirect() {
    if (parentExists()) {

        $("a[id$= lnkHome]").attr('href', 'window.close();');
    }
    else {

        $("a[id$= lnkHome]").attr('href', 'Default.aspx');
    }
}
function parentExists() {

    return (window.parent.location === window.location) ? false : true;
}

It works, but for some reason check fails and it always redirects me to Default.aspx even if calling page is still open. What do I need to change here? Unfortunately I have to use HyperLink control. I am using ASP.NET 4.0

Answer 1

I would check for window.opener instead of window.parent since you are opening the window using window.open

Your parentExistis func become this:

function parentExists() { 
    return window.opener!==null;
}

Or…

function parentExists() { 
    return window.opener!==null && window.opener.location.href===window.location.href;
}