typeof

gistfile1.txt

function t(obj) {
	var typeString = ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1];
	if(typeString == "Object"){ return f(obj.constructor); }
	else{ return typeString; }
}

function f(m){
	return m.name || m.toString().match(/function\s+([^(]+)/)[1];
}