How to Find a Page loaded in Iframe or not

We can check if a page is loaded in Iframe or not using Javascript -- Why do we need this For me its Iframe APPS
So use the below code in the Iframe Page.Bingo you have the result.

Iframe load Detect

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1. <script type="text/javascript">  
2.     if (top == self)  
3.         alert('Not in an iframe');  
4.     else  
5.         alert('In an iframe');  
6. </script>  

<script type="text/javascript"> if (top == self) alert('Not in an iframe'); else alert('In an iframe'); </script>