~~~
//生成随机数字或字母
var suijichars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
var suijinums = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
suijishu = function(n, t) {
var res = "";
for (var i = 0; i < n; i++) {
if (t == 1) {
var id = Math.ceil(Math.random() * 35);
res += suijichars[id];
} else {
var id = Math.ceil(Math.random() * 9);
res += suijinums[id];
}
}
return res;
}
~~~
*****
~~~
//循环输出当前时间（到秒）
tiaomiao = function(el) {
//获得显示时间的div
t_div = el;
var now = new Date()
//替换div内容
t_div.innerHTML = "现在是" + now.getFullYear() + "年" + (now.getMonth() + 1) + "月" + now.getDate() + "日" + now.getHours() + "时" + now.getMinutes() + "分" + now.getSeconds() + "秒";
//等待一秒钟后调用time方法，由于settimeout在time方法内，所以可以无限调用
setTimeout(time, 1000);
}
~~~
*****
~~~
//验证码倒计时
yzmdjs = function(el) {
// 原生js版本
//<input id="send" type="button" value="发送验证码">
var times = 60, // 临时设为60秒
timer = null;
el.onclick = function() {
// 计时开始
timer = setInterval(function() {
times--;
if (times <= 0) {
send.value = '发送验证码';
clearInterval(timer);
send.disabled = false;
times = 60;
} else {
send.value = times + '秒后重试';
send.disabled = true;
}
}, 1000);
}
}
~~~
