Robert Mudry's book should be renamed "The DHTML Companion for IE". He does an excellent job of describing DHTML for Microsoft's Internet Explorer, but nearly excludes Netscape Navigator completely. That is fine if you are publishing web sites design strictly for IE, however in the real web designers have to accommodate as many browsers as possible. The scope of Mudry's book is too narrowly focused to be useful. Perhaps if he defined what was compatible with the different browsers certain portions of the book would be of use. Finding out that Mudry's scripts don't work in Netscape through errors and crashed browsers is not acceptable. O'Reilly's "Dynamic HTML, the Definitive Reference" is the way to go.