How to open a popup window and closing in JavaScript?

How to open a popup window and closing in JavaScript?, someone asked me to explain?

In this article we will discuss about popup window and closing it.  To open a window by using The has as 4 optional parameters.

Syntax:, name, features, replace) 

URL: URL is to open a page, if it is not specified a new window will open it should be blanked.

  • Name: It is a target attribute or the name of the window.
  •         _blank URL is loaded in a new window.
  •         _parent URL is loaded into a parent frame
  •         _self URL replaces the current page
  •          _top URL replaces any framesets that may be loaded 

Features: The postion of the window where to locate top, left and also has features such as resizable,scrollbars,,heights etc.

Replace: It specifies the URL is new entry or to replaces old entry as new entry. It will work if the url is loaded into the same window. It has two properties true or false.


<input type="button" value="Open popup" onclick="openPopup()" />

<input type="button" value="Close popup" onclick="closePopup()" />

<script type="text/javascript">

    var popup;

    function openPopup() {

        popup"", "My Window", "height=300,width=300")



    function closePopup() {






popup window using javascript

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