Javascript 遍历对象的属性和方法

[js]
function allProperties(obj) {

var properties = "";
//开始遍历
for(var p in obj){
if(typeof(obj[p])=="function"){
obj[p]();
} else {
properties += p + "=" + obj[p] + "\t";
}
}
alert(properties);
}
[/js]