var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice <= 0.33) {
    computerChoice = "rock";
} else if(computerChoice >= 0.66) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
} console.log("Computer: " + computerChoice);

var compare = function(userChoice, computerChoice) {
    if(userChoice === computerChoice) {
        return "The result is a tie!";
    }
    else if (userChoice === "rock") {

        if(computerChoice === "scissors") {
            return "rock wins";
        }
        else {
            return "paper wins";
        }
    }
    else if (userChoice === "paper") {

        if (computerChoice === "rock") {
            return "paper wins";
        }
        else {
            return "scissors wins";
        }
    }
    else if(userChoice === "scissors") {
        if (computerChoice === "rock") {
            return "rock wins";
        }
        else {
            return "scissors wins";
        }
    }
}
alert("The computer chooses " + computerChoice);
alert (compare(userChoice,computerChoice));