Detecting IE in javascript

detectIE

//Return IE version or if not IE return false

function isIE () {
  var myNav = navigator.userAgent.toLowerCase();
  return (myNav.indexOf('msie') != -1) ? parseInt(myNav.split('msie')[1]) : false;
}

//Example:

if (isIE () == 8) {
 // IE8 code
} else {
 // Other versions IE or not IE
}
//or

if (isIE () < 9) {
 // is IE version less than 9
} else {
 // is IE 9 and later or not IE
}
//or

if (isIE()) {
 // is IE
} else {
 // Other browser
}

//source http://stackoverflow.com/a/15983064/1442566