我正在尝试制作一个自动滚动的div，当它到达末尾时会回到顶部。但它不起作用...functionscrollPannel(){varpannel=document.getElementById('pannel');if(typeofscrollPannel.count=='undefined'){scrollPannel.count=0;}else{scrollPannel.count+=2;}//troubleishereif((scrollPannel.count-pannel.scrollHeight)>pannel.clientHeight){scrollPannel.coun

我正在尝试制作一个自动滚动的div，当它到达末尾时会回到顶部。但它不起作用...functionscrollPannel(){varpannel=document.getElementById('pannel');if(typeofscrollPannel.count=='undefined'){scrollPannel.count=0;}else{scrollPannel.count+=2;}//troubleishereif((scrollPannel.count-pannel.scrollHeight)>pannel.clientHeight){scrollPannel.coun