检测IP地址是否真正合法的函数-ASP教程,客户端相关

function checkip2(sipaddress)

{

var exp=/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/;

var reg = sipaddress.match(exp);

var errmsg="你输入的是一个非法的ip地址段！\nip段为：:xxx.xxx.xxx.xxx（xxx为0-255)！"

var msg="你输入的是一个合法的ip地址段！"

if(reg==null)

{

alert(errmsg);

}

else

{

alert(reg);

}

}