JS随机打乱数组顺序

目录：

概述：

实现代码：

	function randArray(data){
		//获取数组长度
		var arrlen = data.length;
        //创建数组 存放下标数
		var try1 = new Array();
		for(var i = 0;i < arrlen; i++){
			try1[i] = i;
		}
        //创建数组 生成随机下标数
		var try2 = new Array();
		for(var i = 0;i < arrlen; i++){
			try2[i] = try1.splice(Math.floor(Math.random() * try1.length),1);
		}
        //创建数组，生成对应随机下标数的数组
		var try3 = new Array();
		for(var i = 0; i < arrlen; i++){
			try3[i] = data[try2[i]];
		}
		return try3;
	}
	var arr = ["a","b","c","d"];
	alert(randArray(arr));