Javascript 모바일과 PC 체크하는 법

var UserAgent = navigator.userAgent; 
var ConType = ""; 
// 모바일 체크 
if (UserAgent.match(/iPhone|iPod|Android|Windows CE|BlackBerry|Symbian|Windows Phone|webOS|Opera Mini|Opera Mobi|POLARIS|IEMobile|lgtelecom|nokia|SonyEricsson/i) != null || UserAgent.match(/LG|SAMSUNG|Samsung/) != null){ 
    ConType = "mobile"; 
}else{ 
    ConType = "PC"; 
} 
alert(ConType);