Open a link that is inside a iframe with JQuery

i have IFrame in my page and a link inside it, i want to open that link immediately after opening my page. for example i have a page index.html and inside this page i have an IFrame and inside this IFrame i have a link for example

<a href="http://google.com">google</a>

now i want to open this link when i load Index.html i want to know how can i do this with JQuery or JavaScript ?