JS实现随机生成10个手机号的方法示例

<script>
function getMoblieNum(){
var numArray = new Array("139","138","137","136","135","134","159","158","157","150","151","152","188","187","182","183","184","178","130","131","132","156","155","186","185","176","133","153","189","180","181","177");  //这是目前找到的除了数据卡外的手机卡前三位，类型是字符串数组
var numList = "";  //创建一个数组用来存放10个手机号
var arraryLength = numArray.length;  //获取数组长度，这样如果手机号前三位取值单位发生变化，在下一步求i的地方就不用修改随机数取值范围了
for( var n = 0; n < 10; n++){
var i = parseInt( Math.random() * arraryLength); //注意乘以的是上面numArray数组的长度，这样就可以取出数组中的随机一个数。random的取值范围是大于等于0.0，小于1.0，相乘后得到的就是0到（数组长度-1）的值。
var num = numArray[i];  //取出随机的手机号前三位并赋值给num，手机号前三位是字符串类型的
for ( var j = 0; j < 8; j++){
num = num + Math.floor(Math.random() * 10);   //num是字符串，后面的数字被当做字符串。所以变成两个字符串拼接了
}
if(n == 0){
numList = numList + num;  //第一个手机号前不出现“，”
}
else{numList = numList + "," + num;}  //从第一个手机号后面到最后一个之前用逗号分隔
}
var numSpan = document.getElementById("moblieNum");
numSpan.innerHTML = numList; //修改span的内容，每次都是清空修改，而不是叠加
}
</script>

<input type='button' value='随机生成10个电话号码' onclick='getMoblieNum()' /><br/>
电话号码：<div id='moblieNum'></div>