Firstly, only one page is loaded at a time (unless there's something that you're not telling us regarding the use of iframes or some such).
I'm not sure why you think it would. A call to window.open returns an object reference to the new window, not a string containing that windows's document's text.
Also, a page request to a JSP doesn't necessarily trigger a call to any particular JSP method defined on that page. Where are you calling calledMethod()? [ November 19, 2007: Message edited by: Ben Souther ]