How to close the pop up window of modal dialog?

I am using modal dialog to validate server credentials. After clicking on submit button it开发者_如何学Python pops up new window. Further i want call a servel. But its get called in the same pop up window. I want to call it in the parent window by closing the pop up window. How to achieve this?

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// opening new window
var myWindow = window.open(...);

// when you want to close it
myWindow.close();

If you want to close the popup window in JS executed on this new window's content it's even easier:

window.close()