Close button click event Capture

Button

< a > only need to add the following script to your page ...
function Window.onbeforeunload ()
{
Event.returnvalue = "The page would be closed, comfirm to close?";
}

< two > Purpose
By capturing the click of the browser's Close button event, you can give a prompt message before the page closes, prompting you to close it.

< three extension of > Application
You can continue to add Ajax parts, go back to the operation of the code, you can clear the session operation, etc., to achieve the purpose of freeing space.

< four > applications mainly used in BS structured