如何判断用户输入的是否是电子邮件。

[会织网的蚂蚁]

如何判断用户输入的是否是电子邮件。

[interest]

for i=0 to len(str)
if mid(str,i,1)="@"then
succ=true
exit for
else
succ=false
end if

next

if succ=true then

response.write("success")

end if

不是很好我一时想的。 下一个动网论坛分析一下

[xulovewei]

<script>
if(document.receiveaddr.useremail.value.length!=0)
{
if (document.receiveaddr.useremail.value.charAt(0)=="." ||
document.receiveaddr.useremail.value.charAt(0)=="@"||
document.receiveaddr.useremail.value.indexOf('@', 0) == -1 ||
document.receiveaddr.useremail.value.indexOf('.', 0) == -1 ||
document.receiveaddr.useremail.value.lastIndexOf("@")==document.receiveaddr.useremail.value.length-1 ||
document.receiveaddr.useremail.value.lastIndexOf(".")==document.receiveaddr.useremail.value.length-1)
{
alert("Email地址格式不正确！");
document.receiveaddr.useremail.focus();
return false;
}
}
else
{
alert("Email不能为空！");
document.receiveaddr.useremail.focus();
return false;
}

}
//-->
</script>
<input name="useremail" type="text">

[flying310]

判断输入的字符串里含有@ . com或net

[PPLUNCLE]

用正则表达式：

function test_email(strEmail) {
var myReg = /^[_a-z0-9]+@([_a-z0-9]+\.)+[a-z0-9]{2,3}$/;
if(myReg.test(strEmail)) return true;
return false;
}