DEF animate Script { 
      eventIn SFFloat setTime
          field SFNode nurb USE nurb 
          directOutput TRUE
      url "javascript:
          function setTime(value) {
                          nurb.controlPoint[3].z = 5*Math.sin(value*2*Math.PI);                
                          nurb.controlPoint[10].z = 10*Math.sin(value*2*Math.PI);                
                          nurb.controlPoint[14].z = 5*Math.sin(value*2*Math.PI);                
          }
      "        
  }