alert("test");    // 메시지창띄움
var mywindow = window.open('','','width=200,height=100');    // 새창띄우기
if (confirm("Are you sure?")) {// Yes/No를묻는다이얼로그창띄움. Yes일때만true
    console.log("Yes~");
}else{
    console.log("No~");
}

varname = prompt("Enter name"); // 사용자의입력받는창띄움
console.log(varname);
mywindow.close();

history.back();

console.log(window.location.hostname);

//location.assign("http://www.naver.com");
//location.reload();