If you wanna choose random students to form a single group or team, you can add this to the choose random person script:

var randomNumber2 = parseInt(Math.random() * class_list.length);
while(randomNumber2 == randomNumber){
    randomNumber2 = parseInt(Math.random() * class_list.length);
}

We make a new random number. As long as the number is the same as our first number, we make a new rand0m number.

If you need another member in the group we simply repeat the step:

var randomNumber3 = parseInt(Math.random() * class_list.length);
while(randomNumber3 == randomNumber || randomNumber3 == randomNumber2){
    randomNumber3 = parseInt(Math.random() * class_list.length);
}

Only difference is that we this check that the new number is not the same as the first one or (or is written like this: || in JavaScript) the same as the second one. For more group or team members just repeat this step. Remember to add the extra or condition to check the 4′th random number also is difference form the 3′rd one.

The we need to make the random group members:

var name2 = class_list[randomNumber2];
var name3 = class_list[randomNumber3];

Finally we will alert the result:

alert(name + "n" + name2 + "n" + name3 );

“n” shows next name on a new line. Good luck.