By Jeffrey Sambells
Jeremy Keith's acclaimed ebook, DOM Scripting (friends of ED: 1590595335, 2005), assisting you grasp the following point with numerous genuine international tutorials.
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Extra resources for AdvancED DOM scripting : dynamic web design techniques
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'; By using quotes and concatenation, the resulting string has no white space between the tags. Optional semicolons and parentheses It’s not necessary for you to include a semicolon (;) to conclude a statement or a line. ' only in the event that a is equal to b but will always alert 'false? ' regardless of the conditional operator. These interpretations can sometimes become confusing to read for both beginning and experienced developers, especially if they’re intermingled with different markup such as HTML.
Method, quite often. The problem with using getElementById() is that it retrieves everything based on id and all the ids in a document must be unique. So what do you do when you want to retrieve a group of common items? You can get a list of like tags using getElementsByTagName(), but that won’t work for unlike tags. all) ? com) and is one of many variations on the same idea. I’ve reworked their code to be more verbose, so you can understand what’s going on. $() lookup mentioned earlier for the DOM object reference and reversed the order of their arguments so that the class name is first rather than last, because Firefox 3 will be introducing a core getElementsByClassName() method that takes the class as the first argument (matching that will mean fewer code changes if you want to switch to the internal method in the future).