求大神发一个html+css+js左右滑动，鼠标经过停止，移开继续滑动

    
    


    
        #demo {
            width: 100px;
            height: 100px;
            position:absolute;
            border-radius:50px;
        }
    
 
    
        window.onload = function(){
            var demo = document.getElementById('demo');
            var sx = sy = 10;
            var x = y = 0;
 
            function move(){
                if(document.documentElement.clientWidth - demo.offsetWidth-10 < x || x < 0){
                    sx = -sx;
                }
 
                if(document.documentElement.clientHeight - demo.offsetHeight-10 < y || y < 0){
                    sy = -sy;
                }
 
                x = demo.offsetLeft + sx;
              // y = demo.offsetTop + sy;
 
                demo.style.left = x + 'px';
              //  demo.style.top = y + 'px';
            }
 
            var timer = setInterval(move, 100);
 
            demo.onmouseover = function(){
                clearInterval(timer);
            }
 
            demo.onmouseout = function(){
                timer = setInterval(move, 100);
            }
        }
    
 
    
    

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