Javascript IE detection

ie_detect

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

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


if ( isIE () == 9 ) {
  //is IE version 9
} else{
  // Other versions IE or not IE      
}

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