typeof 정확한 판별

@http://www.juniac.net/176

function typeoftostr(o) {
	return Object.prototype.toString.call(o);
}
document.write(typeoftostr("dfdf"));
document.write(typeoftostr([]));
document.write(typeoftostr({}));
document.write(typeoftostr(1));
document.write(typeoftostr(true));

출력 : [object String][object Array][object Object][object Number][object Boolean]