function precalc() {
            k=0;
            x = [-25]; y = [-25];
            for(i=0;i<3.14;i+=0.02){
                sin = Math.round(Math.sin(i)*10)-25;
                x.push(sin);
            }
            for(i=0;i<3.14*2;i+=0.04){
                sin = Math.round(Math.sin(i)*10)-25;
                y.push(sin);
            }
            setInterval("anim()", 20);
        }
        function anim(){
            bp = document.getElementById('check').style;
            document.all ? bp.backgroundPosition = x[k]+' '+y[k] : bp.backgroundPosition = x[k]+'px '+y[k]+'px;';
            k++;
            if (k>x.length-1) k = 0;
        }
        function addPartyzant() {
              var name = document.getElementById("txtNick").value;
              var oneline = document.getElementById("txtNote").value;
              var prob = document.getElementById("txtPercent").value;
              var city = document.getElementById("txtCity").value;
              $("#ovul").animate
              ( {opacity: 0.4}, "slow",
                    function(){
                         $("#loading").slideDown("slow");
                         $.ajax({
                              type: "GET",
                              url: "http://atariarea.krap.pl/party08/partyadd.php",
                              data: 'name='+name+'&oneline='+oneline+'&prob='+prob+'&city='+city,
                              success: function(txt1){
                                  $("#loading").slideUp("slow");
                                  $("#ovul").append(txt1);
                                  $("#ovul").animate({opacity: 1});
                              }
                         }) 
                    }
               );
          return false;
          }
        window.onload = precalc;