var agt=navigator.userAgent.toLowerCase();
var ie  = (agt.indexOf("msie") != -1);
var ns  = (navigator.appName.indexOf("Netscape") != -1);
var win = ((agt.indexOf("win")!=-1) || (agt.indexOf("32bit")!=-1));
var mac = (agt.indexOf("mac")!=-1);

if (ie && win) {        pluginlist = detectIE("ShockwaveFlash.ShockwaveFlash.1","Shockwave Flash"); }
if (ns || !win) {
                nse = ""; for (var i=0;i<navigator.mimeTypes.length;i++) nse += navigator.mimeTypes[i].type.toLowerCase();
                pluginlist = detectNS("application/x-shockwave-flash","Shockwave Flash");
}

function detectIE(ClassID,name) { result = false; document.write('<SCRIPT LANGUAGE=VBScript>\n on error resume next \n result = IsObject(CreateObject("' + ClassID + '"))</SCRIPT>\n'); if (result) return name+','; else return ''; }

function detectNS(ClassID,name) { n = ""; if (nse.indexOf(ClassID) != -1) if (navigator.mimeTypes[ClassID].enabledPlugin != null) n = name+","; return n; }

pluginlist += navigator.javaEnabled() ? "Java," : "";
if (pluginlist.length > 0) pluginlist = pluginlist.substring(0,pluginlist.length-1);


/////////////////////////////////////// 사용법 //////////////////////////////////////
//
// 플래쉬가 있는지 체크하려면
// if (pluginlist.indexOf("Flash")!=-1)
// document.write("플래쉬가 설치되어 있습니다")
// 처럼 합니다
// Flash, Windows Media Player, Java, Shockwave, RealPlayer, QuickTime, Acrobat Reader, SVG Viewer, 
// 등도 위의 방법으로 체크할 수 있습니다
//
////////////////////////////////////////////////////////////////////////////////////