How can JavaScript make a Web site easier to use?

[deveshraigniit]

Hi,

JavaScript's greatest potential gift to a Web site is that scripts can make the page more immediately interactive, that is, interactive without having to submit every little thing to the server for a server program to re-render the page and send it back to the client. For example, consider a top-level navigation panel that has, say, six primary image map links into subsections of the Web site. With only a little bit of scripting, each map area can be instructed to pop up a more detailed list of links to the contents within a subsection whenever the user rolls the cursor atop a map area. With the help of that pop up list of links, the user with a scrip table browser can bypass one intermediate menu page. The user without a scrip table browser (or who has disabled JavaScript) will have to drill down through a more traditional and time-consuming path to the desired content.

[ross88online]

Although java script has many functionality it has many limitation .It may harm your device by spreading virus.

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I parse data using JSON in javascript, I find this is very convenient. But when I using XML, I need to look down every nodes. It seems that the XML is more complex. Is there any Javascript for erase some plain on creating and reading xml document? please recommend.