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<SCRIPT LANGUAGE="JavaScript">
<!--
/**
函数名: chkIP
功 能: 校验IP地址是否合法,并检查IP地址类型.
参 数: ###.###.###.### 格式的IP字符串
返回值: 整数,意义见注释
日 期: 2006-7-19
作 者: 梅雪香(meixx)
*/
function chkIP(ipStr){
//参数格式校验 成功继续,失败返回-1
ipStr = ipStr.replace(/\s/g, " ");
var reg = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/;
if(reg.test(ipStr) == false){
return -1;
}
//ip地址合法性校验 成功继续 ,失败返回-2
var arr = ipStr.split( ". ");
for(var i=0;i <4;i++){
arr[i] = parseInt(arr[i],10);
if(parseInt(arr[i],10) > 255)
return -2;
}
var ip = arr.join( ". ");
//返回IP地址的类型 包括:
//异常:0 A类:1 B类:2 C类:3 D类:4 E类:5 A类私有:6 B类私有:7 C类私有:8 本机IP:9 广播地址:10
//A类子网掩码:11 B类子网掩码:12 C类子网掩码:13
var retVal = 0;
var n = arr[0];
if(ip == "255.255.255.255 ") retVal = 10;
else if(ip == "255.255.255.0 " ) retVal = 13;
else if(ip == "255.255.0.0 ") retVal = 12;
else if(ip == "255.0.0.0 ") retVal = 11;
else if(ip == "0.0.0.0 " || ip == "127.0.0.1 ") retVal = 9;
else if(n <= 126) retVal = (n == 10 ? 6 : 1);
else if(n <= 191) retVal = (n == 172 ? 7 : 2);
else if(n <= 223) retVal = (n == 192 ? 8 : 3);
else if(n <= 239) retVal = 4;
else if(n <= 255) retVal = 5;
return retVal;
}
function test ()
{
document.write(chkIP( "11.65.96.1") + " <br> ");
document.write(chkIP( "130.65.96.1") + " <br> ");
document.write(chkIP( "210.65.96.1") + " <br> ");
document.write(chkIP( "234.65.96.1") + " <br> ");
document.write(chkIP( "251.65.96.1") + " <br> ");
document.write(chkIP( "10.65.96.1") + " <br> ");
document.write(chkIP( "172.65.96.1") + " <br> ");
document.write(chkIP( "192.65.96.1") + " <br> ");
document.write(chkIP( "0.0.0.0") + " <br> ");
document.write(chkIP( "127.0.0.1") + " <br> ");
document.write(chkIP( "255.255.255.255 ") + " <br> ");
document.write(chkIP( "255.0.0.0") + " <br> ");
document.write(chkIP( "255.255.0.0") + " <br> ");
document.write(chkIP( "255.255.255.0") + " <br> ");
document.write(chkIP( "255.255.256.0") + " <br> ");
document.write(chkIP( "255.sd5.256.0") + " <br> ");
}
//-->
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