1.

Detect if JavaScript is disabled in a web browser

Answer»

The javascript:void(0) evaluates an expression even if its addition to a web page brings unwanted output.

Use the void(0) to get the undefined primitive VALUE. Here, we are preventing the page from loading on clicking the hyperlink:

<html>    <head>       <script>          <!--          //-->       </script>    </head>    <body>       <p>On clicking the below LINK, NOTHING will happen...</p>       <a HREF="javascript:void(0)">Try to click me!</a>    </body> </html>

The output is displayed below. Nothing happens when the link is CLICKED: 


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