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Use of the jquery regular

Source: Internet
Author: User
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Transferred from: http://www.maiziedu.com/wiki/jquery/regular/

The basic regular

1, the creation of regular expressions

a) var checknum =/^[a-za-z0-9]+$/;

b) var re=new RegExp ("[" +s1+ "]", "G");

2. Common rules

A) User password:/^[a-za-z][a-za-z0-9_]{5,20}$/

b) Mail:/^[\w-]+ (\.[ \w-]+) *@[\w-]+ (\.[ \w-]+) +$/

c) Mobile:/^[\d]{5,20}$/

d) Other common validation: please Baidu

3. Method: Test

Case 
<!DOCTYPE HTML><HTML><Head>    <MetaCharSet= "UTF-8">    <title>jquery Ajax</title>    <Scripttype= "Text/javascript"src= "Public/js/jquery-2.2.3.min.js"></Script></Head><Body><formAction="">    <label>User name:</label><spanID= "Check_username">Detection</span>    <inputtype= "text"ID= "T_username"placeholder= "Please enter"/>    <HR/>    <label>Mailbox:</label><spanID= "Check_email">Detection</span>    <inputtype= "text"ID= "T_email"placeholder= "Please enter"/>    <HR/>    <label>Cell phone:</label><spanID= "Check_phone">Detection</span>    <inputtype= "text"ID= "T_phone"placeholder= "Please enter"/>    <HR/></form></Body><Script>    $(function () {        //User name        $("#check_username"). Click (function(){            varStr= $("#t_username"). Val (); varret= /^[a-za-z][a-za-z0-9_]{5,20}$/; if(Ret.test (str)) {alert ('OK'); }Else{alert ('wrong');        }        }); //Mail        $("#check_email"). Click (function(){            varStr= $("#t_email"). Val (); varret= /^[\w-]+ (\.[ \w-]+) *@[\w-]+ (\.[ \w-]+) +$/; if(Ret.test (str)) {alert ('OK'); }Else{alert ('wrong');        }        }); //Mobile Phone        $("#check_phone"). Click (function(){            varStr= $("#t_phone"). Val (); varret= /^[\d]{5,20}$/; if(Ret.test (str)) {alert ('OK'); }Else{alert ('wrong');    }        }); });</Script></HTML>

Effect Demo diagram

Use of the jquery regular

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