谁能说一下消息由下到上的滚动播出的发法，消息是由数据库中提的

<SCRIPT language=JavaScript>
<!--//
var version = "other"
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) version = "n3";
else if (browserName == "Netscape" && browserVer < 3) version = "n2";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version = "e4";
else if (browserName == "Microsoft Internet Explorer" && browserVer < 4) version = "e3";
function marquee1()
{
if (version == "e4")
{
document.write("<marquee behavior=scroll direction=up width=100% height=100 scrollamount=1 scrolldelay=40 onmouseover='this.stop()' onmouseout='this.start()'>")
}
}
function marquee2()
{
if (version == "e4")
{
document.write("</marquee>")
}
}
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</SCRIPT>
<table border="0" cellpadding="0" cellspacing="0" width="150" class="comment-font-size">
<tr>
                <td align=left bgcolor=#000000 height=1></td>
             </tr>
                  <tr>
                    <td height="20" bgcolor="#DFF4D5">
                      <p align="center"><FONT style="FONT-SIZE: 12px">|&nbsp;信息&nbsp;|</FONT>
                    </td>
                  </tr>
  <tr>
                      <td align=left bgcolor=#000000 height=1></td>
                    </tr>
                  <tr>
                    <td valign="top">
                      <SCRIPT language=JavaScript>marquee1();</SCRIPT><font color=#139867 style="FONT-SIZE: 12px">
                      test
                      </font>
                      </td>
                  </tr>
  </table>