Marquee-鼠标控制

<table>
<tr>
  <td>
   <img src="images1/an2.gif" id="imgLeft" onMouseOver="r_left()" onMouseOut="r_left_out()" width="23" height="20">
  </td>
  <td>
   <DIV id=demo style="OVERFLOW: hidden; WIDTH: 270px; COLOR: #ffffff; HEIGHT: 70px">
    <table><tr><td id=demo1>
    <table width="360" height="60" border="0">
       <tr>
     <td width="30" height="45" align="center" valign="bottom"><img src="<%=request.getContextPath() %>/include/images1/csszx.jpg" width="75" height="40"></td>
     <td width="80" height="45" align="center" valign="bottom"><img src="<%=request.getContextPath() %>/include/images1/csbjx.jpg" width="75" height="40"></td>
     <td width="80" height="45" align="center" valign="bottom"><img src="<%=request.getContextPath() %>/include/images1/csshx.jpg" width="75" height="40"></td>
     <td width="80" height="45" align="center" valign="bottom"><img src="<%=request.getContextPath() %>/include/images1/csqdx.jpg" width="75" height="40"></td>
     <td width="30" height="45" align="center" valign="bottom"><img src="<%=request.getContextPath() %>/include/images1/csqzx.jpg" width="75" height="40"></td>
      </tr>
      <tr class="wenbenziti">
     <td height="15" align="center">深圳</td>
     <td height="15" align="center">北京</td>
     <td align="center">上海</td>
     <td align="center">青岛</td>
     <td align="center">泉州</td>
      </tr>
    </table>
    </td><TD id=demo2 width="0"></TD>
    </tr></table>
   </DIV>
  </td>
  <td>
   <img src="images1/an1.gif" onMouseOver="r_right()" onMouseOut="r_right_out()" id="imgRight" width="23" height="20">
  </td>
</tr>
</table>

< script >
var dir=0//每步移动像素，大＝快
var speed=1//循环周期（毫秒）大＝慢
demo2.innerHTML=demo1.innerHTML
function Marquee(){//正常移动
//alert(demo2.offsetWidth+"\n"+demo.scrollLeft)
if (dir>0 && (demo2.offsetWidth-demo.scrollLeft)<=0) demo.scrollLeft=0
if (dir<0 &&(demo.scrollLeft<=0)) demo.scrollLeft=demo2.offsetWidth
demo.scrollLeft+=dir

demo.onmouseover=function() //暂停移动
demo.onmouseout=function() //继续移动
}
function r_left(){if (dir=-1)dir=1}//换向左移
function r_right(){if (dir=1)dir=-1}//换向右移
function r_left_out()
function r_right_out()
var MyMar=setInterval(Marquee,speed)

</ script >