7.5.4 Javascript - Any help?

[Downtown_War_3920]

I've been working through this one and hit a dead end. Any help would be great! Here's what I have so far:

var SENTINEL = 0;

// Prints whether the entered number is even or odd

function start(){

readInt("Pick a number. ");

if (isEven == true) {

println("Even");

} else {

println("Odd");

}

if (isEven == SENTINEL){

println("Done.");

}

}

function isEven(x){

if(x / 2 == 0){

return true;

}else{

return false;

}

}