asp怎么判断符号 @ 就是判断邮件输入是否正确？

[feike0o]

JSP好象有indexOf这函数，ASP呢？

[stefli]

<%
dim pos
pos=InStr(,接受搜索的字符串,"@")
%>

pos为@出现的位置，如果为0，或者1，或者字符长度，那就出错了。

[possible_Y]

^[\w-]+@[\w-]+\.(com|net|org|edu|mil)$

[jasonli403]

相对，觉得如楼上使用正则表达式好一点。

[随风奔跑]

对阿
到现在正则表达式我还不大会用。
真是失败

[denghan]

^[\w-]+@[\w-]+\.(com|net|org|edu|mil)$
这个好

[mmhh516]

用JAVASCRIPT会比较好一些！

[arbeng2002]

if instr(email,"@")=0 or right(email,1)="@" or left(email,1)="@" then
response.write "<script>alert('email字段错误，请重新输入！');history.back();</Script>"
response.end
end if

[arbeng2002]

if instr(email,"@")=0 or right(email,1)="@" or left(email,1)="@" then
response.write "<script>alert('email字段错误，请重新输入！');history.back();</Script>"
response.end
end if

这样就可以判断了啊,没有输入@就出错，输入xx@也出错.,必须要有@和. 而且@在.之前才行的,可以了吧?呵呵,

[jackyoung02]

function checkEmail(checkString)
{
var newstr = "";
var at = false;
var dot = false;

// DO SOME PRELIMINARY CHECKS ON THE DATA

// IF EMAIL ADDRESS HAS A '@' CHARACTER
if (checkString.indexOf("@") != -1) {
at = true;

// IF EMAIL ADDRESS HAS A '.' CHARACTER
} else if (checkString.indexOf(".") != -1) {
dot = true;
}
// PARSE REMAINDER OF STRING
for (var i = 0; i < checkString.length; i++) {
ch = checkString.substring(i, i + 1)
if ((ch >= "A" && ch <= "Z") || (ch >= "a" && ch <= "z")
|| (ch == "@") || (ch == ".") || (ch == "_")
|| (ch == "-") || (ch >= "0" && ch <= "9")) {
newstr += ch;
if (ch == "@") {
at=true;
}
if (ch == ".") {
dot=true;
}
}
}
if ((at == true) && (dot == true)) {
return true;
}
else {
// DISPLAY ERROR MESSAGE
// alert ("Sorry, the email address you\nentered is not in the correct\nformat.");
return false;
}
}