Based on jquery regular authentication URL, email address code

Today, a friend asked me this question, so I intend to post it to share.

In fact, the implementation is very simple, because the regular expression rules are the same, in PHP can be used, so in JS also can be used.

As long as the regular expression is written correctly, half of it succeeds.

The following directly on the code, see it again.

Don't forget to introduce the jquery library.

The code is as follows

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function Ismessemailok (messemail) { var a=/w+ ([-+.] w+) *@w+ ([-.] w+) *.w+ ([-.] w+) * * *; if (!a.test (Messemail)) { Alert ("Warning: Incorrect mailbox format!"); Here are some other things you can write about, such as resetting a form or something. For example, reset the input box with ID messemail to null below $ (' #messemail '). Val ('); F.messemail.focus (); return false; }else{ return true; } }

or directly using JS

It is convenient to use regular expressions, "/^ ([a-za-z0-9_-]) +@ ([a-za-z0-9_-]) + ((. a-za-z0-9_-]{2,3}) {1,2}) $/"the correct mailbox format that meets the requirements.

The code is as follows	Copy Code
function Isemail (str) { var reg =/^ ([a-za-z0-9_-]) +@ ([a-za-z0-9_-]) + (. [ a-za-z0-9_-]{2,3}) {1,2}) $/; return Reg.test (str); }

jquery standard network address regular, such as Http://www.111cn.net

The code is as follows

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function Ismesswebsiteok (messwebsite) { var a=/(https?):/ /([^./]+)([.]?) ([^./]+) ([.]?) ([^./]+) (/[w-./?%&=]*)?/I; if (!a.test (Messwebsite)) { Alert ("Warning: URL format is not correct!"); Here are some other things you can write about, such as resetting a form or something. For example, reset the input box with ID messwebsite to null below $ (' #messwebsite '). Val ('); F.messwebsite.focus (); return false; }else{ return true; } }

If you want to have a port or something, use the example below.

The javascript! of the regular expression judgment of this URL More comprehensive. It verifies the situation including IP, domain name (domain), FTP, two-level domain name, domain name files, domain name plus port! User name and so on, looks like the author is also on the Internet, I deducted from a project code, is the strongest I have ever seen the most comprehensive way to verify the URL! Too fierce, posted here to share with you first, later do not remember when to look for a blog, the URL verification is very frequent.

The code is as follows

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function Isurl (Str_url) var Strregex = "^ (HTTPS|HTTP|FTP|RTSP|MMS)?:/ /) + "? ([0-9a-z_!~* ' (). &=+$%-]+:)? [0-9a-z_!~* ' (). &=+$%-]+@)? " FTP user + "([0-9]{1,3}.) {3} [0-9] {1,3} "//IP form of URL-199.194.52.18 + "|"//allow IP and domain + "([0-9a-z_!~* ' ()-]+.) * "//Domain name-www + "([0-9a-z][0-9a-z-]{0,61})?" [0-9a-z]. " Second-level domain + "[a-z]{2,6}]"///domain-. com or. Museu + "(: [0-9]{1,4})?"//Port-: 8 + "((/?)|" A slash isn ' t required if there is no file Nam + "(/[0-9a-z_!~* ' ().;?: @&=+$,%#-]+) +/?" $" var re=new RegExp (Strregex) Re.test ( if (Re.test (Str_url)) Return (TRUE) }else Return (false) }