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serverFrame.setExecOnReturn()

    function func(s) {
        // copy returned items in s (i.e. sf1 or sf2, dependant on which
        // serverframe called the function) to visible locations
    }
    sf1.setExecOnReturn(func)
    sf2.setExecOnReturn(func)

This method is the heart of Mapclient.It specifies the JavaScript function that will be executed every time a WebServer puts something in the serverFrame. A WebServer cannot put anything in single elements of a browser page; it always completely replaces the target page, frame or iframe. That is why MapClient places everything that comes back from a server in an invisible iframe within a serverFrame. The "onReturn()" method copies this to the actual visible locations. As a rule of thumb, a serverFrame should contain no more than one form with hidden variables, or a single HTML element, like a table. Complex SPAN elements with subdivisions that form separate entities on the Web page can also be put to great effect in a serverFrame.
The parameter to "setExecOnReturn()" is a JavaScript function that should already exist when this method is called. This function is automatically called with one parmeter: the serverFrame that actually called the function when a server request returned to it. That way generic functions can be written for different serverFrames.
See the User's Guide 4.1 and 4.2 for this important concept.