。net 环境下实现图片无刷新滚动

<form   id="Form3"   method="post"   runat="server">
<FONT   face="宋体"> </FONT>
<TABLE   id="Table1"   style="WIDTH:   800px;   HEIGHT:   136px"   cellSpacing="0"   cellPadding="0"
border="0">
<TR>
<TD>
<div   id="demo"   style="OVERFLOW:   hidden;   WIDTH:   1000px;   HEIGHT:   125px"   align="center"
DESIGNTIMEDRAGDROP="134">
<TABLE   style="WIDTH:   725px;   HEIGHT:   96px">
<TR>
<TD   id="demo1"   vAlign="middle"> <asp:datalist   id="TopNewslist"   runat="server"   Width="712px"   RepeatDirection="Horizontal">
<ItemTemplate>
<FONT   face="宋体">
<TABLE   id="Table2"   style="WIDTH:   102px;   HEIGHT:   100px"   cellSpacing="0"   cellPadding="0"
width="102"   border="0">
<TR>
<TD> <IMG   style="WIDTH:   98px;   HEIGHT:   95px"   height=95   alt=产品照片   src= ' <%#   DataBinder.Eval(Container.DataItem,"img_url","upimg/{0}")%> '   width=98   border=0> </TD>
</TR>
<TR>
<TD   align="center"> <A   href= 'Productinfo.aspx?Pid= <%#DataBinder.Eval(Container.DataItem,"id")%> '   target=_blank> <%#   DataBinder.Eval(Container.DataItem,"img_url")%> </A> </TD>
</TR>
</TABLE>
</FONT>
</ItemTemplate>
<AlternatingItemTemplate>
<TABLE   id="Table4"   style="WIDTH:   102px;   HEIGHT:   117px"   cellSpacing="0"   cellPadding="0"
width="102"   border="0">
<TR>
<TD> <IMG   style="WIDTH:   98px;   HEIGHT:   95px"   height=95   alt=产品照片   src= ' <%#   DataBinder.Eval(Container.DataItem,"img_url","upimg/{0}")%> '   width=98   border=0> </TD>
</TR>
<TR>
<TD   align="center"> <A   href= 'Productinfo.aspx?Pid= <%#DataBinder.Eval(Container.DataItem,"id")%> '   target=_blank> <%#   DataBinder.Eval(Container.DataItem,"img_url")%> </A> </TD>
</TR>
</TABLE>
</AlternatingItemTemplate>
</asp:datalist> </TD>
<TD   id="demo2"   vAlign="top"> <FONT   face="宋体"> </FONT> </TD>
</TR>
</TABLE>
</div>
</TD>
</TR>
</TABLE>
<script>
var   Picspeed=30
demo2.innerHTML=demo1.innerHTML
function   Marquee1()...{
if(demo2.offsetWidth-demo.scrollLeft <=0)
demo.scrollLeft-=demo1.offsetWidth
else...{
demo.scrollLeft++
}
}
var   MyMar1=setInterval(Marquee1,Picspeed)
demo.onmouseover=function()   ...{clearInterval(MyMar1)}
demo.onmouseout=function()   ...{MyMar1=setInterval(Marquee1,Picspeed)}
</script>
</form>