本代码是从个人项目中提取出来的，应该可以算的上是相当全面有效的IP相关信息的验证代码了，用来前端验证

/* ****************** */var judgeIpIsLegal = function(ipAddr){ var regIps = /^(((25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|[0-9])\.){3}(25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|[0-9]))$/; return regIps.test(ipAddr);}var praseIpToBinary = function(ipAddress){ var numArray = ipAddress.split("."); if(numArray.length != 4){ alert("输入的IP有误"); return; } var returnIpStr = ""; for (var i = 0; i < 4; i++) { var curr_num = numArray[i]; var number_Bin = parseInt(curr_num); number_Bin = number_Bin.toString(2); var iCount = 8-number_Bin.length; for (var j = 0; j < iCount; j++) { number_Bin = "0"+number_Bin; } returnIpStr += number_Bin; } return returnIpStr;}var judgeSubnetMask = function(ipAddress){ var binaryIpString = praseIpToBinary(ipAddress).toString(); var subIndex = binaryIpString.lastIndexOf("1")+1; var frontHalf = binaryIpString.substring(0,subIndex); var backHalf = binaryIpString.substring(subIndex); if(frontHalf.indexOf("0") != -1 || backHalf.indexOf("1") != -1){ return false; }else{ return true; }}var getIPsAndResult = function(ipAddr1,ipAddr2){ var ipArray1 = ipAddr1.split("."); var ipArray2 = ipAddr2.split("."); var returnResult = ""; if(ipArray1.length != 4 || ipArray2.length != 4 ){ alert("输入的IP有误"); return; } for (var i = 0; i < 4; i++) { var number1 = parseInt(ipArray1[i]); var number2 = parseInt(ipArray2[i]); returnResult += number1&number2; if(i<3){ returnResult += "."; } } return returnResult;}var judgeGatewayResult = function(ipAddr,subnetMask,gateway){ var andResult1 = getIPsAndResult(ipAddr,subnetMask); var andResult2 = getIPsAndResult(gateway,subnetMask); if(andResult1 == andResult2){ return true; }else{ return false; }}

以上所述就是本文的全部内容了，希望大家能够喜欢。