检查Email地址的比较完善的正则表达式函数

下面的函数可以对Email地址格式进行检查,只有形如:
[email protected][email protected][email protected]状的串才能通过检查,
如下面这些非法地址都通不过:
@[email protected][email protected][email protected].,abc@163@net等等都能剔除出来。

邮件地址就这几种格式吧?比如:
[email protected][email protected][email protected]
还有没有更长的?

 1<script language="JavaScript1.2">   
 2function checkmail(mail)   
 3var strr;   
 4re=/(\w+@\w+\\.\w+)(\\.{0,1}\w*)(\\.{0,1}\w*)/i;   
 5re.exec(mail);   
 6if (RegExp.$3!=""&&RegExp.$3!="."&&RegExp.$2!=".") strr=RegExp.$1+RegExp.$2+RegExp.$3   
 7else   
 8if (RegExp.$2!=""&&RegExp.$2!=".") strr=RegExp.$1+RegExp.$2   
 9else strr=RegExp.$1   
10if (strr!=mail) {alert("请填写正确的邮件地址;return false}   
11return true;   
12}   
13</script>
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