$(function () {
var version = navigator.userAgent;
if (version.indexOf("Windows NT 5.0")!=-1 ) {
alert("windows 2000");
} else if (version.indexOf("Windows NT 5.1")!=-1 ) {
alert("windows xp");
} else if (version.indexOf("Windows NT 5.2")!=-1 ) {
alert("windows 2003");
} else if(version.indexOf("Windows NT 6.0")!=-1){
alert("windows vista");
} else if(version.indexOf("Windows NT 6.1")!=-1){
alert("windows 7");
} else if(version.indexOf("Windows NT 6.2")!=-1){
alert("windows 8");
} else if(version.indexOf("Windows NT 10.0")!=-1){
alert("windows 10");
}
})
