Stack overflow "in" can only be used on objects Invalid prototype "instanceof" can only be used on function objects Only objects may be assigned to the options array Access denied Array is read-only Property is read-only This method can only be used on a Date object Invalid array length Program halted by the web browser Program halted by the user String memory error (internal) NOT IMPLEMENTED YET... The first parameter of "for .. in" must be of type reference Internal error 3 (property name is NULL) Internal error 1 (identifier resolution with NULL pointer) Left side of an assignment must be of type reference Expression cannot be evaluated to a reference Only objects may be called as functions This object cannot be called as a function This object cannot be used as a constructor Call to "new" has not returned an object as the result "new" can only be used on objects Invalid reference (function or object not defined?) Internal data types cannot be converted Object cannot be converted to a primitive value Cannot create an object from the "null" value Cannot create an object from an undefined value Out of memory