JavaScript performs a series of commands to perform various tasks without putting load on the server. This is because commands are carried out on the users PC. Common uses include form validation or a calculator.
How does Javascript work?
Javascript will only work if the software is installed and enabled in the users browser. The software recognises the commands and performs tasks based on these commands such as editing the markup to make something move around on the page or performing a mathematical calculation.
Browser Compatibility
IE6 V FF2
The main difference between Mozilla browsers and Internet Explorer is the method of accessing data on the page.
Where IE uses document.all, Mozilla uses the standards compliant document.getElementById().
In the past, programmers have checked for particular browsers to choose their method, however this can shut out new browsers
and the point of having a common API is interoperability. Checking for particular browsers defeats that purpose.
It is better to check for the existence of methods and objects you are planning to use.
Tags: JavaScript
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