Derek

/* Javascript functionsisArrayisNullisEmptyisObjectisUndefinedisFunction*/function isArray(a) { return typeof a == 'object' && a.constructor == Array; }function isNull(a) { return typeof a == 'object' && !a; }function isEmpty(o) { var i, v; if (isObject(o)) { for (i in o) { v = o[i]; if (isUndefined(v) && isFunction(v)) { return false; } } } return true; }function isObject(a) { return (a && typeof a == 'object') || isFunction(a); }function isUndefined(a) { return typeof a == 'undefined'; }function isFunction(a) { return typeof a == 'function'; }