Links to Iframes: Links in the containing document intended for loading new documents into iframes indicate that by including the name of the iframe in their target attribute.
Links in Iframed Document: Regular links in the document inside the iframe will load the new document inside the iframe. For example, load the page describing the JavaScript methods in this iframe. Then hit your browser's back button to restore this page to the iframe.
This link to the list of Iframes Examples will load into the main window. It includes a target attribute set to _parent.