[JS] 현재 브라우저 체크

var Browser = {
    a : navigator.userAgent.toLowerCase()
}

Browser = {
    ie : /*@cc_on true || @*/ false,
    ie6 : Browser.a.indexOf('msie 6') != -1,
    ie7 : Browser.a.indexOf('msie 7') != -1,
    ie8 : Browser.a.indexOf('msie 8') != -1,
    opera : !!window.opera,
    safari : Browser.a.indexOf('safari') != -1,
    safari3 : Browser.a.indexOf('applewebkit/5') != -1,
    mac : Browser.a.indexOf('mac') != -1,
    chrome : Browser.a.indexOf('chrome') != -1,
    firefox : Browser.a.indexOf('firefox') != -1
}

function whatKindOfBrowser() {
	if (Browser.chrome) {
		alert("It is chrome browser");
	} else if (Browser.ie6) {
		alert("It is ie6 browser");
	} else if (Browser.ie7) {
		alert("It is ie7 browser");
	} else if (Browser.ie8) {
		alert("It is ie8 browser");
	} else if (Browser.opera) {
		alert("It is opera browser");
	} else if (Browser.safari) {
		alert("It is safari browser");
	} else if (Browser.safari3) {
		alert("It is safari3 browser");
	} else if (Browser.mac) {
		alert("It is mac browser");
	} else if (Browser.firefox) {
		alert("It is firefox browser");
	} else {
		alert("It is maybe ie");
	}
}

출처: http://blog.naver.com/PostView.nhn?blogId=kimgungoo&logNo=90090453994