Web—09-正则表达式

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<h3 id="-" style="margin: 1.3em 0px 1em; padding: 0px; font-weight: bold; font-size: 1.3em">正则表达式
<h5 id="1-" style="margin: 1.3em 0px 1em; padding: 0px; font-weight: bold; font-size: 1em">1、什么是正则表达式：
<p style="margin: 0px 0px 1.2em !important">能让计算机读懂的字符串匹配规则。

<h5 id="2-" style="margin: 1.3em 0px 1em; padding: 0px; font-weight: bold; font-size: 1em">2、正则表达式的写法：

2）转义字符匹配：

\d 匹配一个数字，即0-9

\D 匹配一个非数字，即除了0-9

\w 匹配一个单词字符（字母、数字、下划线）

\W 匹配任何非单词字符。等价于[^A-Za-z0-9_]

\s 匹配一个空白符

\S 匹配一个非空白符

\b 匹配单词边界

\B 匹配非单词边界

. 匹配一个任意字符

var sTr02 = sTr01.replace(re01,'');

var sTr03 = sTr01.replace(re02,'');

var sTr04 = sTr01.replace(re03,'');

alert(sTr02); // 弹出 abdefedcbaCef

alert(sTr03); // 弹出 abdefedbaCef

alert(sTr04); // 弹出 abdefedba*ef

<h5 id="-" style="margin: 1.3em 0px 1em; padding: 0px; font-weight: bold; font-size: 1em">常用正则规则

//邮箱验证：

var reMail = /^[a-z0-9][\w.-]*@[a-z0-9-]+(.[a-z]{2,5}){1,2}$/i;

//密码验证：

var rePass = /^[\w!@#$%^&*]{6,20}$/;
//手机号码验证：

var rePhone = /^1[3458]\d{9}$/;

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