I need to display another external site\'s content into my site. Normally tag can do it. But my requirement is not whole content, only part of th
Set up your AJAX request to hit a PHP script that loads the content (ie, curl) and returns it as the AJAX's xhr response. An AJAX response (in your case, the partial page) can be loaded and inserted into the current page according to the target element's id, for example.
See this question, it pretty much your issue: https://stackoverflow.com/questions/3928228/php-and-curl-get-ajax-data
A javascript library like jQuery takes a lot of the trouble out of AJAX: http://api.jquery.com/load
And if you're still having trouble, debugging ajax with Firebug makes things much easier as you can see what's happening with the request.
(If you don't have server-side scripting, and can't edit your Apache config, you're kinda outta luck, tho.)