JavaScript 正则表达式匹配字母、数字及密码验证实现

<!DOCTYPE HTML>
<html >
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript">
window.onload=function(){
localStorage.fiveData="你好啊 世界";
//alert(localStorage.fiveData);
//var reg=/\d+/g;//匹配任意长度数字

var reg=/[a-z,A-Z]/g;//匹配任意字母
var str="aajdaf1232jadlfjakdjfalkjlakfj2131l34kalfsjaafaqejqe231wk";
var t=str.match(reg);
for(var c in t){
console.log(t[c]);
}

}
</script>
</head>
<body>
</body>
</html>

密码包含数字与字母的验证逻辑

function CheckPassWord(password) {//密码必须包含数字和字母
  var str = password;
  if (str == null || str.length < 8) {
    return false;
  }
  var reg = new RegExp(/^(?![^a-zA-Z]+$)(?!\D+$)/);
  if (reg.test(str))
    return true;
}

纯字母数字混合且无特殊符号的校验

function CheckPassWord(password) {//必须为字母加数字且长度不小于8位
  var str = password;
  if (str == null || str.length <8) {
    return false;
  }
  var reg1 = new RegExp(/^[0-9A-Za-z]+$/);
  if (!reg1.test(str)) {
    return false;
  }
  var reg = new RegExp(/[A-Za-z].*[0-9]|[0-9].*[A-Za-z]/);
  if (reg.test(str)) {
    return true;
  } else {
    return false;
  }
}