<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<title>点击产生随机数</title>
<script language="javascript">
window.onload = function(){
var arr = ['135****8827','137****1621','135****5498' ];
//var index = Math.floor((Math.random()*arr.length));
var list = []; var oBtn = document.getElementById('btn'); oBtn.onclick = function(){
//一开始把下面的这行代码放在了onclick的外面产生的数字都一样
var index = Math.floor((Math.random()*arr.length));
//将数据压入数组中，
var count =list.push(arr[index]);
//控制台中显示
console.log(list);
};
}
</script>
<body>
<button id="btn">点我</button>
</body>
</html>