用ASP判断Email地址是否有效
在用ASP编写页面时，如果涉及到邮件发送，一般会要求输入Email地址。错误的Email地址往往带来许多不必要的麻烦，用下面的函数IsValidEmail就能判断出一个Email地址是否有效。
函数源代码：
<%
Function IsValidEmail(Email)
ValidFlag = False
If (Email "") And (InStr(1, Email, "@") > 0) And (InStr(1, Email, ".") > 0) Then
atCount = 0
SpecialFlag = False
For atLoop = 1 To Len(Email)
atChr = Mid(Email, atLoop, 1)
If atChr = "@" Then atCount = atCount + 1
If (atChr >= Chr(32)) And (atChr = Chr(123)) Then SpecialFlag = True
If (atChr >= Chr(58)) And (atChr = Chr(91)) And (atChr