Ok, odds are pretty good there is a tutorial out there that will teach me this, but every search I am doing seems to be coming up blank. I am guessing I just do not know the correct terminology.
Ok, for instance (though this is not the specific case). Say I wanted to create a webpage, but when the page is loaded I want it to retrieve some specific information from another page.
I load my page, and say it is about water; and then so it loads from Wikipedia and this page:http://en.wikipedia.org/wiki/Water_(molecule)
But just the CAS number.
Is there an easy way to do that? What would that be called? Perhaps a tutorial? I hope my terminology is correct.