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Language: Web
Expertise: Intermediate
Jun 20, 2000



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Browser-Neutral Code for Referring Style Objects

Programming with style sheets is never an easy task if you want to write browser-neutral HTML code. This is because the DOM (Document Object Model) of the Internet Explorer and the DOM of Netscape Navigator browsers are not the same. But don't despair—here is a code fragment that shows how you can write browser-neutral JavaScript code uniquely for referring to styles of HTML objects like DIV, SPAN, etc.

var ie = (navigator.appName == "Microsoft Internet Explorer"); 
// myStyleObj is used to refer the style object of elem1 in the HTML page 
myStyleObj = ie ? document.all.elem1.style : document.elem1;

Now, anywhere in the code where you want to refer to the style object attribute, all you need to do is refer to myStyleObj.

myStyleObj.visibility = "visible"; 
instead of writing... 
document.elem1.visibility = "visible"; // for Netscape Navigator and, 
document.all.elem1.style.visibility = "visible"; // for Internet Explorer 

This saves you from lots of browser compatibility issues, and it also helps you to write structured code. Also, it is a good idea to keep an array of style objects (of the HTML tags of our interest), in the beginning, and refer to them by using an appropriate index whenever required.

Ajith Prasad
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