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";
}
var compare=function(choice1, choice2) {
    if (choice1===choice2)
       return "The result is a tie!";


    if(choice1 === "rock")
       {
           if (choice2 === "scissors")
           {
               return "rock wins.";
           }
              else if (choice2 === "paper")
              {
                  return "paper wins.";
              }
        }

    else if(choice1 === "paper")
        {
            if (choice2 === "rock")
            {
                return "paper wins!";
            }
              else if (choice2 === "scissors")
              {
                  return "scissors wins.";
              }
        }
    else if (choice1 === "scissors")
        {
            if (choice2 === "rock")
            {
                return "rock wins!";
            }
              else if (choice2 === "paper")
              {
                  return "scissors wins!";
              }
        }


};
console.log(compare (choice1, choice2));