HELP! * YELLOW=global GREY=local Global HTML version of Foils prepared 21 February 97

Foil 12 Example of a JavaScript Function

From Feb 17/19 Delivered Lecture for Course CPS616 -- aJavaScript Language Objects and Frames CPS616 spring 1997 -- Feb 17 and 19 1997. by Geoffrey Fox * Important Information in IMAGE
Secs 302.4 Addon
top.setframe("help.html","maindisplay");
function setframe(relativeurldesired,framelabel) {
  • var actualurl = top.baseurl + relativeurldesired;
  • top.frames[framelabel].location.href = this.actualurl;
}
top is a Netscape(Navigator) object with a property frames which is an array labelled by either integers or by value of name attribute in <frame> name="textofframelabel" </frame> tag
Setting a URL into location.href property of a frame loads that page into given frame.
top labels functions defined in page that defines frames
use this.actualurl to distinguish function's variable actualurl from a global variable of same name
Put these functions in <head> </head> section so as to ensure they are loaded before anything else
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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