JavaScript and Ajax for the Web, Sixth Edition

When creating your pages, it's a great idea to make sure that you're making pages that adhere to Web standards; such pages load quicker in modern browsers and are easier to maintain. The easiest way to check a page that you're working on for valid code is by running it against the page validator maintained by the World Wide Web Consortium (W3C), at http://validator.w3.org. This bookmarklet, Script 17.13 , checks the page currently shown in your browser for validity. It does this by taking the URL of the current page, passing it to the validator, and then opening a new window with the validator's results, as shown in Figure 17.24 .

Script 17.13. Use this script to make sure your pages contain Web-standard, valid markup.

To validate your pages:

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  javascript:void(window.open('http://validator.w3.org/check?uri= '+widdow.location.href,'' ,'width= 800,height=900,status=yes, resizable=yes,scrollbars=yes, location=yes'));

  This one, useful as it is, isn't exactly rocket science. First, we open a window and pass that window the URL to the validator. You'll note the validator has a parameter, uri , which accepts the URL of the current page, which we pass as window.location.href . The plus sign between the two concatenates the location object to the validator's URL. The rest of the line is just parameters for the window's size and other attributes.