function IsEmail(s)
{
var patrn=/^([0-9A-Za-z]{1,20}\@(([0-9a-zA-Z])+\.)+(com|cn|org|net|edu)[;]{0,1})+$/;
if (!patrn.exec(s)) return false;
return true;
}测试代码:
<script>
function IsEmail(s)
{
var patrn=/^([0-9A-Za-z]{1,20}\@(([0-9a-zA-Z])+\.)+(com|cn|org|net|edu)[;]{0,1})+$/;
if (!patrn.exec(s)) return false;
return true;
}
</script>
<input type = "text" id="a" size="50">
<input type = "button" onClick="if(IsEmail(a.value)) alert('valid'); else alert('invalid');" value="check">
{
var patrn=/^([0-9A-Za-z]{1,20}\@(([0-9a-zA-Z])+\.)+(com|cn|org|net|edu)[;]{0,1})+$/;
if (!patrn.exec(s)) return false;
return true;
}测试代码:
<script>
function IsEmail(s)
{
var patrn=/^([0-9A-Za-z]{1,20}\@(([0-9a-zA-Z])+\.)+(com|cn|org|net|edu)[;]{0,1})+$/;
if (!patrn.exec(s)) return false;
return true;
}
</script>
<input type = "text" id="a" size="50">
<input type = "button" onClick="if(IsEmail(a.value)) alert('valid'); else alert('invalid');" value="check">
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货