常用正则校验 常用正则校验长度在8-15之间判断密码满足大写字母,小写字母,数字和特殊字符,其中四种组合都需要包含var reg = /^(?=.?[a-z])(?=.?[A-Z])(?=.?\d)(?=.?[!#@&.])[a-zA-Z\d!#@&.]* ^.{8,15}$/;判断密码满足字母数字符号其中任意两种var reg = /(?!^[0-9]+$)(?!^[a-zA-Z]+$)(?!^[^A-z0-9]+$)^.{8,15}$/;