JavaScript & DHTML Cookbook 
by Danny Goodman

THe following error was *corrected* in the 3/06 reprint:

Here's a key to the markup:
	[page-number]: serious technical mistake
	{page-number}: minor technical mistake
	<page-number>: important language/formatting problem
	(page-number): language change or minor formatting problem




{396} initDrag() function;

// Assign event handlers used by both Navigator and IE
function initDrag() {
    if (document.layers) {
        // turn on event capture for these events in NN4 event model
        document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
        return;
    } else if (document.body & document.body.addEventListener) {
	//turn on event capture for these events in W3C DOM event model
	document.addEventListener("mousedown", engage, true);
	document.addEventListener("mousemove", dragIt, true);
	document.addEventListener("mouseup", release, true);
     }
      document.onmousedown = engage;
      document.onmousemove = dragIt;
      document.onmouseup = release;
    return;
}



NOW READS:

// Assign event handlers used by both Navigator and IE
function initDrag() {
    if (document.layers) {
        // turn on event capture for these events in NN4 event model
        document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
        return;
    }
  	document.onmousedown = engage;
   	document.onmousemove = dragIt;
   	document.onmouseup = release;
    return;
}