browserSniffing.js

/**
 * browser sinffing
 * http://james.padolsey.com/javascript/detect-ie-in-js-using-conditional-comments/
 */
(function(){

	var ie = (function(){
		var undef,
			v = 3,
			div = document.createElement('div'),
			all = div.getElementsByTagName('i');
		while (
			div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
			all[0]
		);
		return v > 4 ? v : undef;
	}());

	/* jQuery interface */

	$.browser.ie6 = (ie === 6);
	$.browser.ielt7 = (ie < 7);
	$.browser.ie7 = (ie === 7);
	$.browser.ielt8 = (ie < 8);
	$.browser.ie8 = (ie === 8);
	$.browser.ielt9 = (ie < 9);
	$.browser.ie9 = (ie === 9);

})();