IE browser sniffing using conditional comments

gistfile1.js

/**
 * Browser sniffing using conditional comments. JavaScript Patterns book.
 * It is slightly safer than looking for strings in navigator.userAgent, 
 * because these strings are easy to change by the user.
 * 
 * Having this:
 * var isIE = /*@cc_on!@*/false;
 * will set isIE to false in all browsers (because they ignore the comment), 
 * but it will be true in Internet Explorer, because of the negation ! in the 
 * conditional comment. 
 * 
 * It’s as if IE sees:
 * var isIE = !false; // true
 * 
 */

if (/*@cc_on!@*/false) {
	//do something on IE
}