1 <div id="scrollDiv">放些文字或图片</div> 2 <script type="text/javascript"> 3   var x = 50,y = 60;  4   var xin = true, yin = true ; 5   var step = 1 ; 6   var delay = 10 ; 7   var obj=document.getElementById("scrollDiv") ; 8    9   function closeDiv(){10       document.getElementById(‘scrollDiv‘).style.display=‘none‘;11   }12   function rollMethod() { 13       var L=T=0;14       var R= document.body.clientWidth-obj.offsetWidth ;15       var B = document.body.clientHeight-obj.offsetHeight ;16       obj.style.left = x + document.body.scrollLeft ;17       obj.style.top = y + document.body.scrollTop ;18       x = x + step*(xin?1:-1) ;    19       if (x < L) { xin = true; x = L} 20       if (x > R){ xin = false; x = R} 21       y = y + step*(yin?1:-1) 22       if (y < T) { yin = true; y = T } 23       if (y > B) { yin = false; y = B } 24       } 25       var itl= setInterval("rollMethod()", delay) ;26       obj.onmouseover=function(){clearInterval(itl)} ;27       obj.onmouseout=function(){itl=setInterval("rollMethod()", delay);28   } 29    30 </script>