正则表达式积累实例

验证用户邮箱：

var z=/^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;

  if(!z.test(user_email)){
   $("#user_email_error").html("用户邮箱格式不正确");
   return false;
  }

 

验证ip地址：

var zz=/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/;

  if(!zz.test(ip)){
   art.dialog.alert('IP段不合法！', function () {});
   return false;
  }

 

 

验证ip段地址：

 var zz=/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\/([0-9]|1[0-9]|2[0-9]|3[0-2])$/;

  if(!zz.test(ip)){
   art.dialog.alert('IP段不合法！', function () {});
   return false;
  }