1.密码必须为6-18位字母、数字、特殊符号的：
代码如下 varreg =/^(?=.*[a-zA-Z])(?=.*\d)(?=.*[~!@#$%^&*()_+`\-={}:";'<>?,.\/]).{6,18}$/;2.密码必须为6-18位字母、数字
代码如下 varreg=/^(?![^a-zA-Z]+$)(?!\D+$)/3.支持字母、数字、标点符号、特殊字符
代码如下 varreg=/^(?:(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])|(?=.*[A-Z])(?=.*[a-z])(?=.*[^A-Za-z0-9])|(?=.*[A-Z])(?=.*[0-9])(?=.*[^A-Za-z0-9])|(?=.*[a-z])(?=.*[0-9])(?=.*[^A-Za-z0-9])).{6,}|(?:(?=.*[A-Z])(?=.*[a-z])|(?=.*[A-Z])(?=.*[0-9])|(?=.*[A-Z])(?=.*[^A-Za-z0-9])|(?=.*[a-z])(?=.*[0-9])|(?=.*[a-z])(?=.*[^A-Za-z0-9])|(?=.*[0-9])(?=.*[^A-Za-z0-9])|).{6,}$/js正则表达式验证数字|JS正则表达式验证密码格式的集中情况总结
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