How to access a javascript object value without knowing the key

If I have a javascript object like this :

data = {
    a : 2,

    b : 3
}

but a and b are arbitrary and decided at runtime. Is there any way to go through the object
and access all properties without knowing the key?

Answer

data = {
    a : 2,
    b : 3

}

for(var propName in data) {
    if(data.hasOwnProperty(propName)) {
        var propValue = data[propName];
        // do something with each element here
    }
}