javascript return the method or value of Object

po.js

function po(obj, property, func) {
// eval(obj.functionname);
var str = '';
for (prop in obj) {
if (typeof(obj[prop]) != 'function') {
if (property != false) {
str += prop + ':' + obj[prop] + '\n';
}
} else if (func != false) {
str += prop + ':' + typeof(obj[prop]) + '\n';
}
}
return str;
}