Get a property from an object using jpath notation (I don't even know if that notation exists, but it is like 'object.property1.property2'). I use it to get properties of unknown objects that may or may not have a property, and they raise an exception.

getJpath.js

    getJpath = function(object, path){
        var segments = path.split('.');
        var first = segments.shift(); // and it removes it from the array
        if( object[first] ) {
            if( segments.length > 0 ) {
                return getJpath(object[first], segments.join('.'));
            } else {
                return object[first];
            }
        } else {
            return null;
        }
    };