正则表达式--常用正则

• 两位整数，两位小数，小数部分可以不输

  /^[\d]{1,2}([.]{1}[\d]{1,2})?$/

   

• 手机

  /^1[3|4|5|7|8|9][0-9]\d{8}$/

   

• 邮箱

  /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/

   

• ip

  /^(\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])$/