External as in another site or the same websites, outside the blog location?
From the way you’re talking, I’m going to guess you’re talking about an external site. If you’re attempting to pull from an external site, Cross (X) Site Scripting is 1) Normally not allowed by security measures 2) A generally bad idea unless you really know what you’re doing 3) If you don’t run that external site and try to XSS it – it could be seen as a hacking attempt by the sites owner.
RSS is a much better way to go.
no i am talking about in the same site..in my blog i have added ajax tab menu and i need to run wordpress code from external php file. because my ajax menu (now) working only firefox i need this in order to display my blog on ie regularly??