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This marches up the tree from the element supplied in the first argument to find the first enclosing tag whose name matches the second argument. Utterly meaningless, but it looks like what… a warning?
An element is a piece of HTML that represents one thing: You may recall from the previous chapter the technique of referring to a Function object without calling it.
Another issue is that the book uses some very complicated examples with complex logic. Badly implemented standards are a bigger problem. Buy your own copy of the book now, right here at SitePoint. The Desiggn standards specify a document. That code creates two four-by-four tables, each with javasript and row headings so each table contains five rows and five columns in total.
Some users find this useful; others find it heartily annoying. There’s a problem loading this menu right now.
There was little regard for cross-browser compatibility, although Microsoft copied and supported most of the modenr innovations made by Netscape. The next level of DOM manipulation, above and beyond changing the properties of elements that are already there, is to add and remove elements dynamically.
Keeping your HTML valid avoids all these problems.
We can, for example, find the name of the browser the “user agent string” as follows:. Throughout the book, the author will keep assuming implicitly that you already have a good programming background he uses a more complex logic in his code ,and will leave many things unexplained or explained too late.
We’re storing the dimensions of the larger image in custom attributes on the a element: So, now you know some common events, and when they fire. Thanks for the link hdtml Sitepoint. Some of the following script may seem a little opaque: Like a lot of the other reviewers, I found the first few chapters the most helpful. DHTML Utopia is an easy-to-follow, step-by-step tutorial that will show you how to make your websites more slick, dynamic, and usable.