jQuerry popup that pop's up when a user visits my q2a site

Question

I  am trying to add a jQuerry popup that pop's up when a user visits my q2a site, please suggest me how can I do this from the index.php file.

 

Example http://www.itechroom.com/demo/simple_jquery_popup_example2/

Comments

do you want to show this each time or only for the first time

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I want to show it once per user session and only at the home page.

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Popup on road timing is seen well at spam site. And, it may be blocked by browser or security software. You may stop and search another way. Is the standard feature of Q2A insufficient?