var regexCode = new RegExp("(^[0-9()+-]{2,8})$");
var regexPhone = new RegExp("(^[0-9]{5,10})$");

function isValidPhone(sender,args)
{
    var flagSTD = false;
    if(objtxtrcode.value == "" && objtxtPhone.value =="")
    {
        sender.innerHTML = "Please enter your Contact No.";
        args.IsValid = false;
        return;
    }
    if(objtxtPhone.value =="")
    {
        sender.innerHTML = "Please enter valid Contact No. (Eg. +91 9812345678 or 01234 12345678)";
        args.IsValid = false;
        return;
    }
    if(objtxtrcode.value != "")
    {
        if(!regexCode.test(objtxtrcode.value))
        {
            sender.innerHTML = "Please enter valid Contact No. (Eg. +91 9812345678 or 01234 12345678)";
            args.IsValid = false;
            return;
        }
        flagSTD = true;
    }
    
    if(objtxtPhone.value != "")
    {
        if(!regexPhone.test(objtxtPhone.value))
        {
            sender.innerHTML = "Please enter valid Contact No. (Eg. +91 9812345678 or 01234 12345678)";
            args.IsValid = false;
            return;
        }
    }
    
      if(IsAllCharZero(objtxtrcode,objtxtPhone) == false)
    {
            sender.innerHTML = "Please enter valid Contact No. (Eg. +91 9812345678 or 01234 12345678)";
            args.IsValid = false;
            return;
    }
    
     args.IsValid = true;
}

function IsAllCharZero(objCode,objPhone)
{
    var valid = false;
    for(var i = 0 ; i < objCode.value.length ;i++)
    {
        if(objCode.value.charAt(i) != 0)
        {
            valid = true;
            break;
        }
    }
     for(var i = 0 ; i < objPhone.value.length ;i++)
    {
        if(objPhone.value.charAt(i) != 0)
        {
            valid = true;
            break;
        }
    }
    return valid;
}