[正則表達式速查表](http://www.jb51.net/shouce/jquery1.82/regexp.html)
[常用正則表達式](http://www.jb51.net/shouce/jquery1.82/regexp.html)
|正則名稱|表達式|
|--|--|
|用戶名 |`/^[a-z0-9_-]{3,16}$/`|
|密碼 |`/^[a-z0-9_-]{6,18}$/`|
|十六進制值 |`/^#?([a-f0-9]{6}|[a-f0-9]{3})$/`|
|電子郵箱 |`/^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/`|
|電子郵箱 |`/^[a-z\d]+(\.[a-z\d]+)*@([\da-z](-[\da-z])?)+(\.{1,2}[a-z]+)+$/`|
|URL |`/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/`|
|Unicode漢字范圍編碼|`/^[\u2E80-\u9FFF]+$/`|
|HTML 標簽 |`/^<([a-z]+)([^<]+)*(?:>(.*)<\/\1>|\s+\/>)$/`|
|IP 地址 |`/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/`|
|IP 地址 |`/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/`|
|刪除代碼\\注釋| `(?<!http:|\S)//.*$`|
|圖像匹配|`http://.*?(jpg|png)`|