text: $(function() {
              $(".knob").knob({
                  /*change : function (value) {
                      //console.log("change : " + value);
                  },
                  release : function (value) {
                      console.log("release : " + value);
                  },
                  cancel : function () {
                      console.log("cancel : " + this.value);
                  },*/
                  draw : function () {
                      // "tron" case
                      if(this.$.data('skin') == 'tron') {
  
                          var a = this.angle(this.cv)  // Angle
                              , sa = this.startAngle          // Previous start angle
                              , sat = this.startAngle         // Start angle
                              , ea                            // Previous end angle
                              , eat = sat + a                 // End angle
                              , r = true;
  
                          this.g.lineWidth = this.lineWidth;
  
                          this.o.cursor
                              && (sat = eat - 0.3)
                              && (eat = eat + 0.3);
  
                          if (this.o.displayPrevious) {
                              ea = this.startAngle + this.angle(this.value);
                              this.o.cursor
                                  && (sa = ea + 0.3)
                                  && (ea = ea - 0.3);
                              this.g.beginPath();
                              this.g.strokeStyle = this.previousColor;
                              this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sa, ea, false);
                              this.g.stroke();
                          }
  
                          this.g.beginPath();
                          this.g.strokeStyle = r ? this.o.fgColor : this.fgColor ;
                          this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, sat, eat, false);
                          this.g.stroke();
  
                          this.g.lineWidth = 2;
                          this.g.beginPath();
                          this.g.strokeStyle = this.o.fgColor;
                          this.g.arc(this.xy, this.xy, this.radius - this.lineWidth + 1 + this.lineWidth * 2 / 3, 0, 2 * Math.PI, false);
                          this.g.stroke();
  
                          return false;
                      }
                  }
              });
  
              // Example of infinite knob, iPod click wheel
              var v, up=0,down=0,i=0
                  ,$idir = $("div.idir")
                  ,$ival = $("div.ival")
                  ,incr = function() { i++; $idir.show().html("+").fadeOut(); $ival.html(i); }
                  ,decr = function() { i--; $idir.show().html("-").fadeOut(); $ival.html(i); };
              $("input.infinite").knob(
                                  {
                                  min : 0
                                  , max : 20
                                  , stopper : false
                                  , change : function () {
                                                  if(v > this.cv){
                                                      if(up){
                                                          decr();
                                                          up=0;
                                                      }else{up=1;down=0;}
                                                  } else {
                                                      if(v < this.cv){
                                                          if(down){
                                                              incr();
                                                              down=0;
                                                          }else{down=1;up=0;}
                                                      }
                                                  }
                                                  v = this.cv;
                                              }
                                  });
          });