<script language="javascript">
                function class6()
                {
                        var val4 = parseInt(document.getElementById("value4").value);
                        var val5 = parseInt(document.getElementById("value5").value);
            var val6 = parseInt(document.getElementById("value6").value);
                        var ansD6 = document.getElementById("answer6");
                        ansD6.value = val4 + val5 + var6;

                                                var rez4;
                                                rez4= val4 + 0;
                                                var rez5;
                                                rez5 = val5 + 0;
                                                var rez6;
                        rez6 = val6 + 0;

                                                if((rez4== 0) || (rez5 == 0) || (rez6==0))
                                                {
                                                var a = document.getElementById("answer6").innerHTML = "";
                                                }

                                                else if((rez4 > 300)&&(rez5 >1000)&&(rez6 > 10))
                                                        {
                                                        var a = document.getElementById("answer6").innerHTML = "Izvan klasifikacije";
                                                        }

                else if((rez4 > 50)&&(rez4 <= 300)&&(rez5 > 200)&&(rez5 <= 1000)&&(rez6 > 2)&&(rez6 <= 10))
                {
                var a = document.getElementById("answer6").innerHTML = "Klasa 3";
                }
                else if((rez4 > 5) && (rez4 <= 50)&&(rez5 > 50)&&(rez5 <= 200)&&(rez6 > 0.2)&&(rez6 <= 2))
                         {
                       var a = document.getElementById("answer6").innerHTML = "Klasa 2";
                        }
                         else
                        {
                    var a = document.getElementById("answer6").innerHTML = "Klasa 1";
                          }






                }
        </script>