Function written in javascript is not working in internet explorer

[BibhuAshish]

Hello guys
i have one function which converts the ip/netmask into networkid/netmask and also it shows the message to user that his ip is changed to network id. but that function is working in mozilla perfectly but not in IE.

To check where is the fault i have written so many alert() but sometimes these are working.
Please someone read my code and tell me why its not working.
i am also sending you the function validateIPandNetMask()
my alert statement is commented so that one can understand my code

var enteredip;
    function validateIPandNetMask()
    {
 
       enteredip=document.addform.ipaddress.value
       firstvalue=document.addform.ipaddress.value;
       //alert("fstvalue="+firstvalue)
       ipnetmaskarr=firstvalue.split("/");
       ip=ipnetmaskarr[0];
       nm=ipnetmaskarr[1];
       //alert("ipnetmask0="+ipnetmaskarr[0]+"ipnetmask1="+ipnetmaskarr[1]);
       if(ipnetmaskarr[1]==null)
       {
            if(validateIPAddress(ipnetmaskarr[0]))
            {
               if(isBrowserIE())
                {
                    window.returnvalue=addform.userid.value+'/'+addform.ipaddress.value;
                }
                else
                {
                    opener.document.viewform.userid.value=document.addform.userid.value;
                    opener.document.viewform.ipaddress.value = firstvalue;
                    opener.document.viewform.mode.value = "<%=FWBMModes.ADD%>";
                    opener.document.viewform.submit();
                }
                self.close();
            } 
              else
            {
                alert("Enter a valid IP Address before proceeding");
                addform.ipaddress.focus();
                return false;
            }
       }
        else
        {
        //alert("ip= "+ip+" nm="+nm);
            if(validateIPAddress(ipnetmaskarr[0]))
            {
                if(validateIPNetmask(ipnetmaskarr[1]))
                {
                    if(isBrowserIE())
                    {
                        window.returnvalue=addform.userid.value+'/'+addform.ipaddress.value;
                    }
                    else
                    {
 
                     //alert("ipnetmask0="+ipnetmaskarr[0]+"ipnetmask1="+ipnetmaskarr[1]);
                        //alert("ippppp= "+ip+" nm="+nm);//In internet explorer this line is executed sometime
                           var networkarr=new Array(4)//not  ok
                           //alert("ip= "+ip+" nm="+nm); //This alert is not working always
                        iparr=ipnetmaskarr[0].split(".");//from this nothing is happening
                        //alert("iparr="+iparr);
                        nmarr=ipnetmaskarr[1].split(".");
                        for(i=0;i<iparr.length;i++)
                        {
                            networkarr[i]=iparr[i]&nmarr[i];
                        }
                        networkid=networkarr.join(".")
                        ipnmaddr=networkid+'/'+ipnetmaskarr[1] 
                        //document.getElementById('ipaddress').value=ipnmaddr;
                        document.addform.ipaddress.value=ipnmaddr;
                        if(firstvalue==ipnmaddr)
                        {
                            opener.document.viewform.userid.value=document.addform.userid.value;
                            opener.document.viewform.ipaddress.value =document.addform.ipaddress.value
                            opener.document.viewform.mode.value = "<%=FWBMModes.ADD%>";
                            opener.document.viewform.submit();
                            self.close();
                        }
                        else
                        {
                            // The networkid is displayed dynamically
                                document.fgColor="red"
                                var tbl = document.getElementById('tblgui');
                                var lastRow = tbl.rows.length;
                                if (lastRow >= 1) 
                                {
                                    tbl.deleteRow(lastRow - 1);
                                    var row = tbl.insertRow(lastRow-1);
                                    text = document.createTextNode("The IP address("+firstvalue+") is changed to networkid");
                                    row.appendChild(text)
                                    document.addform.ignore.disabled=false;
                                    flag=false;
                                    return false;
                                }
                                else
                                {
                                    var row = tbl.insertRow(lastRow);
                                    text = document.createTextNode("The IP address("+firstvalue+") is changed to networkid");
                                    row.appendChild(text)
                                    document.addform.ignore.disabled=false;
                                    flag=false;
                                    return false;
                                }        
                        }
                    }
 
                 }
                else
                {
                alert("Enter a valid NetMask before proceeding");
                addform.ipaddress.focus();
                    return false;
                }
        }
        else
        {
            alert("Enter a valid IP Address before proceeding");
            addform.ipaddress.focus();
            return false;
        }
      }
    }

[dmjpro]

What do you mean by "sometimes these are working." ?

Kind regards,
Debasis Jana

[acoder]

BibhuAshish, welcome to TSDN!

Please use code tags when posting code:

[CODE=javascript]
JavaScript code here...
[/code]

[pbmods]

Heya, Bibhu.

What do you want your code to do? Give an example.
What is your code doing that you don't want it to do? Give an example.
What is your code *not* doing that it is supposed to? Give an example.