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45Chapter 13 .JavaScript Essentials set to display HTML (Web hosting reseller)

Tuesday, July 31st, 2007

45Chapter 13 .JavaScript Essentials set to display HTML that lets users know JavaScript is turned off, and therefore the full benefit of the page isn t available unless they turn on JavaScript. Listing 13-1 shows a skeletal HTML page that uses these tags. Listing 13-1: Employing the

The body of your document.

You can display any standard HTML within the

tag set after more than one <SCRIPT> tag set to let users know what they re missing. Do not include the HTML comment tags that you use in hiding JavaScript statements from older browsers. Their presence inside the <NOSCRIPT> tags prevents the HTML from rendering. Other nonscriptable browsers At this juncture, I must point out that newcomers to scripting frequently want to know what script to write to detect whether JavaScript is turned on. Because scripters are so ready to write a script to work around all situations, it takes some thought to realize that a non-JavaScript browser cannot execute such a script: If no JavaScript interpreter exists in the browser (or it is turned off), the script is ignored. I suppose that the existence of a JavaScript-accessible method for Java detection the navigator.javaEnabled()method promises a parallel method for JavaScript. But logic fails to deliver on that unspoken promise. Another desire is to have JavaScript substitute document content when the browser is JavaScript-enabled. Only in IE4+ and NN6+ can a script replace regular HTML with scripted content. If you develop content that must be backward compatible with older browsers, remember that all HTML in a document appears in the browser window, while scripted content can be additive only. You can use this additive scripting to create unusual effects when displaying different links and (with a caveat) body text for scriptable and nonscriptable browsers. Listing 13-2 shows a short document that uses HTML comment symbols <br />In case you need affordable webhost to host your website, our recommendation is <a href="http://jboss.bluewebsitehosting.net">ecommerce web host</a> services. </p> </div> </div> <div class="post"> <h3 id="post-58"><a href="http://j2ee.solidwebhosting.net/j2ee/44-part-iii-geocities-web-hosting-document-objects-reference-you/" rel="bookmark" title="Permanent Link to 44 Part III . 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