Rock, Paper, Scissors Game Javascript

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{

return "paper wins";

}
}
if (choice1 === "paper") {

if (choice2 === "rock") {

return ("paper wins");}

else{

return ("scissors win");

}
}
if (choice1 === "scissors") {

if (choice2 === "paper") {

return ("scissors wins");}

else{

return ("rock wins");

}
}
};

compare(userChoice, computerChoice);