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鼠标放上去则向上向下滚动的代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml">

<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20language%3D%22javascript%22%20type%3D%22text%2Fjavascript%22%3E%20%0D%0Afunction%20scroll(n)%20%0D%0A%7Btemp%3Dn%3B%20%0D%0Adocument.getElementById(%22Out1%22).scrollTop%2B%3Dtemp%3B%20%0D%0Aif%20(temp%3D%3D0)%20return%3B%20%0D%0AsetTimeout(%22scroll(temp)%22%2C10)%3B%20%0D%0A%7D%20%0D%0A%3C%2Fscript%3E"> 
<ul name="Out1" id="Out1" style="overflow:hidden;height:100px;"> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
<li>xx</li> 
</ul> 
<span><img src="images/bottom.gif" _ewebeditor_ta_src="images%2Fbottom.gif" onmouseover="scroll(-1)" onmouseout="scroll(0)" nmousedown="scroll(-2)" width="10" height:="10" /></span> 
<span><img src="images/top.gif" _ewebeditor_ta_src="images%2Ftop.gif" onmouseover="scroll(1)" onmouseout="scroll(0)"  onmousedown="scroll(2)" width="10" height:="10" /></span>

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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