html - How can I include a JavaScript file on a web page only if the browser is IE 7 or earlier? -

how include java script file based on condition.

to more specific, want include javascript file gives json support if browser ie , version less eight.

use conditional comments http://www.quirksmode.org/css/condcom.html

<!--[if lt ie 8]>       <script src="yourscript.js"></script> <![endif]-->