RotateY div on mousemove jquery

rotatediv_mousemove.js

$(".cont_360").mousemove(function(event) {
          var msg;
          var mX = event.pageX;

          msg = event.pageX + ", " + event.pageY;

          console.log(msg);
          if(mX<fullW/2){
            var speed = (mX/(fullW/2))*1000;
            setTimeout(function(){
              $(".strip").css({ rotateY: '-='+1 }); 
            }, 1100-speed); 
          }
          if(mX>fullW/2){
            var speed = ((mX-(fullW/2))/(fullW/2))*1000;
            setTimeout(function(){
              $(".strip").css({ rotateY: '+='+1 }); 
            }, 1100-speed); 
          }
        });