Since missing parameters are assigned as 'Undefined' would that cause 'Null' to be output if trying to document.write() the undefined parameter?
it would cause undefined, the value of an undefined variable is undefined. In JS: null === undefined; // returns false //Note I used === and not ==. null == undefined; //will return true.
The short answer is no. False, Undefined, NaN, Null, "", and 0 are all different values of nothing.
the function would not execute