Generate random 5 char string

Random

function makeId()
{
    var txt = "",
        rand = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for (var i = 5; i >= 0; i--) {
        txt += rand.charAt(Math.floor(Math.random() * rand.length));
    }
    
    return txt;
}