Ip地址的轉換10進制 16進制轉化

//ip轉為4個字節的16進制.

var ip="192.111.1.1";
function ipcon(ip){

var ipv = ip;
    if(ipv == ''){
        alert("獲取本機ip出現異常!");
        return false;
    }else{
        var ar = ipv.split(".");
        var decm = parseInt(ar[0])*256*256*256+parseInt(ar[1])*256*256+parseInt(ar[2])*256+parseInt(ar[3]);
        var iphex = parseInt(decm).toString(16).toUpperCase();
        //var binary = parseInt(decm).toString(2).toUpperCase();
        //document.getElementById("res").innerHTML = '十六進制 = '+hex+'<br> 十進制 = '+decm+"<br> 二進制 = "+binary;
        
    }
    return iphex;  
}
 ipcon(ip) ;//"C06F0101"


//輸入16進制ip 轉化為10進制ip
function hex(ip){
    var ipv = ip;
    ipv = ipv.toUpperCase();
    if(ishex(ipv)){
        ipv = parseInt(ipv,16)
        var b = new Array();
        b[0] =0;
        b[1] =0;
        b[2] =0;
        b[3] =0;
        var c = 16777216.0;
        for (var i = 0; i < 4; i++) {
           var k = parseInt(ipv / c);
           ipv -= c * k;
           b[i]= k;
              c = c/256.0;
        }
        d=b[0]+'.'+b[1]+'.'+b[2]+'.'+b[3];
        document.getElementById("res2").innerHTML = "IP = "+d;
    }else{
        document.getElementById("error2").innerHTML = '無效的十六進制值';
        return false;
    }
}hex("C06F0101");//"192.111.1.1"

function decimal(ip){
    var ipv =ip;
    if ((/[^0-9]/g.test(ipv))  ==false|| ipv != "") {
        var b = new Array();
        b[0] =0;
        b[1] =0;
        b[2] =0;
        b[3] =0;
        var c = 16777216.0;
        for (var i = 0; i < 4; i++) {
           var k = parseInt(ipv / c);
           ipv -= c * k;
           b[i]= k;
           c = c/256.0;
        }
        d=b[0]+'.'+b[1]+'.'+b[2]+'.'+b[3];
       console.log("ip:"+d);
    }else{
        document.getElementById("error3").innerHTML = '無效的十進制值';
        return false;
    }
}
decimal(2560000001);//ip:152.150.128.1



//判斷是否為16進制的數,返回true false
function ishex(num){
    var validChar='0123456789ABCDEF';
    var flag=true;
    var x=num.toUpperCase();
    for(idx=0;idx<x.length;idx++){
        if(validChar.indexOf(x.charAt(idx))<0){
            return false;
        }
      }
    return true;
}

ishex("a245b");//true

ishex("sa");//false