<script language="javascript" type="text/javascript">
???
</script>
<form name="tform">
<tr>
<td>邮箱</td>
<td><input type="text" name="emeil"></td>
</tr>
……
</form>
<script language="javascript" type="text/javascript">
???
</script>
<form name="tform">
<tr>
<td>邮箱</td>
<td><input type="text" name="emeil"></td>
</tr>
……
</form>
var emails = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/; //验证Email
if(!emails.test(document.form.email.value))
{
alert("请输入正确的Email地址");
}