WebBrowser control: how to suppress message: do you want to close this window

Question

Hi, I'm new to WebBrowser control. In the current project, we use WebBrowser control to integrate with existing project. All popup windows are displayed in a new windows form. When "javascript window:close" is called on the popup window, the IE instance always prompt: do you want to close this window. We're using WndProce to check WM_Destroy to notify the parent form the ie is about to close which works fine. The only thing we don't like the control is that the message "do you want to close this window". Is there any way to suppress the message?

Any suggestion will be highly appreciated. Thanks.

Answer 1

Try using either of the following two functions to close the popup:

function closeWindow()
{
    window.opener = self;
    window.close();
}

Or:

function closeWindow()
{
    window.open('', '_self');
    window.close();
}

Answer 2

This is a security feature of IE. The idea is to prevent potentially malicious scripts to close a window that the user did not want to be closed. The exception is if the window was opened by a script on the same domain, which indicates that it is the web application that "owns" the window, so it can also close it. In this case you don't get the warning.