Extend properties

Extend.js

if(!Object.extend)
Object.extend = function(original){
    var  i = (original)?1:0
        ,args = arguments
        ,original = original || this
        ,length = args.length
        ,key,extended

    for (; i < length; i++){
        extended = args[i] || {};

        for (key in extended){
            if(extended.hasOwnProperty(key)) {
                original[key] = extended[key];
            }
        }
    }
    return original;
};