js数组中随机选取一个数值！！

var arr = ["太阳光大","成功是优点的发挥","不要小看自己", "口说好话","手心向下是助人" ];

alert(arr[Math.floor((Math.random()*arr.length))]);

转载于:https://www.cnblogs.com/teamemory/p/10212591.html