另一种方法是向Array原型添加一个方法:

 Array.prototype.random = function (length) {
       return this[Math.floor((Math.random()*length))];
 }

 var teams = ['patriots', 'colts', 'jets', 'texans', 'ravens', 'broncos']
 var chosen_team = teams.random(teams.length)
 alert(chosen_team)

var item = items[Math.floor(Math.random()*items.length)];

var rndval=items[Math.floor(Math.random()*items.length)];

var random = items[Math.floor(Math.random()*items.length)]

jQuery就是JavaScript!它只是一个JavaScript框架。例如，要找到一个随机项，只需使用普通的JavaScript，

var randomItem = items[Math.floor(Math.random()*items.length)]

使用下划线(或loDash:)):

var randomArray = [
   '#cc0000','#00cc00', '#0000cc'
];

// use _.sample
var randomElement = _.sample(randomArray);

// manually use _.random
var randomElement = randomArray[_.random(randomArray.length-1)];

或者洗牌整个数组:

// use underscore's shuffle function
var firstRandomElement = _.shuffle(randomArray)[0];