Here you can find the source of randEl()
Array.prototype.randEl = function () { return this[Math.floor(Math.random() * this.length)] };
Array.prototype.rand = function() { return this[Math.floor(Math.random() * this.length)]; };
Array.prototype.randFromArr = function() { var a = this[Math.floor(Math.random() * this.length)] return a };
Array.prototype.random = function() { return this[Math.floor( Math.random() * this.length )]
Array.prototype.random = function() { return this[Math.floor(Math.random() * this.length)]; };
Array.prototype.random = function() { return this[~~(this.length * Math.random())]; }; function rand(n) { return ~~(Math.random() * n);