

function IpV4Box(id,pNode){
    this.id = id;
    this.onChange=new Function();
    this.onEnterKey=new Function();
    this.disabled=false;
    
    IpV4Box.all[id]=this;
    if(pNode)
    {
        if(typeof pNode=="string")
        {
            pNode=document.getElementById(pNode);
        }
        pNode.innerHTML=this.toString();
    }
}
IpV4Box.all={};

IpV4Box.EnabledClassName = "ipInput oneInputEnable";
IpV4Box.DisabledClassName="ipInput oneInputDisabled";

IpV4Box.prototype={

    focus:function(index){
        if(!index)
            index=1;
        document.getElementById(this.id+"_"+index).focus();
    },
    setEnable:function(bEnable){
        var b=!bEnable;
        this.disabled=!bEnable;
        var boxes=document.getElementById(this.id).getElementsByTagName("input");
        for(var i=0;i<boxes.length;i++)
        {
            boxes.readOnly=b;
        }
        document.getElementById(this.id).className=bEnable?IpV4Box.EnabledClassName:IpV4Box.DisabledClassName
    },
    toString:function(){
        return '<span id="'+this.id+'" class="' + IpV4Box.EnabledClassName + '" >\
            <input onkeypress="IpV4Box.evt.keypress(this,event)" onkeydown="IpV4Box.evt.keydown(this,event)" onfocus="IpV4Box.evt.focus(this,event)" onpaste="IpV4Box.evt.change(this,event);" oninput="IpV4Box.evt.change(this,event);" onchange="IpV4Box.evt.change(this,event);" type="text" size=3 id="'+this.id+'_1" maxlength=3\
            />.<input onkeypress="IpV4Box.evt.keypress(this,event)" onkeydown="IpV4Box.evt.keydown(this,event)" onfocus="IpV4Box.evt.focus(this,event)" onpaste="IpV4Box.evt.change(this,event);" oninput="IpV4Box.evt.change(this,event);" onchange="IpV4Box.evt.change(this,event);" type="text" size=3 id="'+this.id+'_2" maxlength=3\
            />.<input onkeypress="IpV4Box.evt.keypress(this,event)" onkeydown="IpV4Box.evt.keydown(this,event)" onfocus="IpV4Box.evt.focus(this,event)" onpaste="IpV4Box.evt.change(this,event);" oninput="IpV4Box.evt.change(this,event);" onchange="IpV4Box.evt.change(this,event);" type="text" size=3 id="'+this.id+'_3" maxlength=3\
            />.<input onkeypress="IpV4Box.evt.keypress(this,event)" onkeydown="IpV4Box.evt.keydown(this,event)" onfocus="IpV4Box.evt.focus(this,event)" onpaste="IpV4Box.evt.change(this,event);" oninput="IpV4Box.evt.change(this,event);" onchange="IpV4Box.evt.change(this,event);" type="text" size=3 id="'+this.id+'_4" maxlength=3/>\
        </span>';
    },
    getValue:function(){
        var ip=[
            document.getElementById(this.id+"_1").value,
            document.getElementById(this.id+"_2").value,
            document.getElementById(this.id+"_3").value,
            document.getElementById(this.id+"_4").value
        ];
        return ip.join(".");
        
    },
    setValue:function(ip){
        ip=ip.replace(/[^\d.]/g,"");
        if(ip=="")
        {
            ip="..."
        }
        ip=ip.split(".");
        document.getElementById(this.id+"_1").value = ip[0];
        document.getElementById(this.id+"_2").value = ip[1];
        document.getElementById(this.id+"_3").value = ip[2];
        document.getElementById(this.id+"_4").value = ip[3];
    }
}

IpV4Box.evt = {
    focus: function(obj, evt) {
        obj.select();
    },
    change: function(obj, evt) {
        var v = parseInt(obj.value);
        if (v >= 0 && v <= 255) {
            if (v != obj.value)
                obj.value = v;

        }
        else {
            obj.value = "";
        }

        IpV4Box.all[obj.id.replace(/_\d$/, "")].onChange();
    },
    keypress: function(obj, evt) {
        var key = evt.charCode || evt.keyCode;
        var pos = IpV4Box.evt.getSelection(obj);
        var value = obj.value;
        var c = String.fromCharCode(key);
        if (key >= 48 && key <= 57) {
            value = "" + value.substring(0, pos.start)
                + c + value.substring(pos.end, value.length);

            if (parseInt(value) < 256) {
                var id = obj.id;
                /(.*)_(\d)$/.test(id);
                var index = RegExp.$2;
                IP_id = RegExp.$1;
                if (parseInt(value) >= 100) {
                    if (parseInt(index) < 4) {
                        id = id.replace(/(\d)$/, parseInt(index) + 1);
                        setTimeout("document.getElementById('" + id + "').focus();" +
                            "document.getElementById('" + id + "').select();", 200);
                    }
                }
                setTimeout("IpV4Box.all['" + IP_id + "'].onChange()", 0);
                return true;
            }
            else {

                if (evt.preventDefault)
                    evt.preventDefault();
                evt.returnValue = false;
                return false;
            }
        }
        else {

            if (evt.preventDefault)
                evt.preventDefault();
            evt.returnValue = false;
        }
    },
    keydown: function(obj, evt) {
        var key = evt.charCode || evt.keyCode;
        var pos = IpV4Box.evt.getSelection(obj);
        var value = obj.value;
        var c = String.fromCharCode(key);
        var id = obj.id;
        /^(.*)_(\d)$/.test(id);
        var index = RegExp.$2;
        var Ip_Id = RegExp.$1;
        switch (key) {
            case 13:
                IpV4Box.all[Ip_Id].onEnterKey();
                break;

            case 110:
            case 190:
                if (index < 4) {
                    if (value.length > 0) {
                        id = id.replace(/(\d)$/, parseInt(index) + 1);
                        document.getElementById(id).focus();
                        document.getElementById(id).select();
                    }
                }
                break;

            case 38:

                value = !isNaN(parseInt(value)) ? parseInt(value) : "";
                if (value == "")
                    value = 0;
                if (value < 255) {
                    obj.value = value + 1;
                }
                else
                    obj.value = 0;

                break;
            case 40:
                value = !isNaN(parseInt(value)) ? parseInt(value) : "";

                if (value == "")
                    value = 255;
                if (value > 0) {
                    obj.value = value - 1;
                };
                break;
            case 8:
                if (pos.start > 0)
                    return;

            case 37:
                if (pos.end == 0 && index > 1) {
                    id = id.replace(/(\d)$/, parseInt(index) - 1);
                    document.getElementById(id).focus();
                    document.getElementById(id).select();
                }
                break;
            case 39:
                if (pos.start == value.length && index < 4) {
                    id = id.replace(/(\d)$/, parseInt(index) + 1);
                    document.getElementById(id).focus();
                    document.getElementById(id).select();
                }
                break;


        }



    },

    getSelection: function(oInput) {
        var T = this;
        if (oInput.createTextRange) {
            var s = document.selection.createRange().duplicate();
            s.moveStart("character", -oInput.value.length);
            var p1 = s.text.length;


            var s = document.selection.createRange().duplicate();
            s.moveEnd("character", oInput.value.length);
            var p2 = oInput.value.lastIndexOf(s.text);
            if (s.text == "") p2 = oInput.value.length;


            return { start: p2, end: p1 };

        } else {
            return { start: oInput.selectionStart, end: oInput.selectionEnd };

        }
    }
}
