Code:
var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
} else if (computerChoice <= 0.67) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
}
console.log("Computer: " + computerChoice);
var compare = function (choice1, choice2) {
    if (choice1 === choice2) {
        return "The result is a tie!";
    }
};
if (choice1 = "rock") {
    if (choice2 = "scissors") {
        console.log("rock wins");
    } else {
        console.log("paper wins");
    }
}
if (choice1 === "paper") {
    if (choice2 === "rock") {
        console.log("paper wins");
    } else {
        console.log("scissors wins");
    }
}
if (choice1 === "scissors") {
    if (choice2 === "paper") {
        console.log("scissors wins");
    } else {
        console.log("rock wins");
    }
}