紅色字體改下就好了。需要用document.getElementById指定對象 

<div id="gundongxinxi" style="width: 999px; height: 23px; overflow: hidden" onmouseover="stop()"
            onmouseout="start()">
            <table width="999" border="0" cellspacing="0" cellpadding="0" id="scrollimg" height="23">
                <tr>
                    <td id="simg">
                        <table width="999" border="0" cellspacing="0" cellpadding="0" height="23">
                            <tr>
                                <td>
                                    <a href="AboutMe.htm" style="color: #000000; font-weight: normal;">不间断文字滚动</a>
                                </td>
                            </tr>
                        </table>
                    </td>
                    <td id="simg1">
                    </td>
                </tr>
            </table>

            <script language="JavaScript">
            var tm = null
            var scrollimg=document.getElementById("scrollimg");
            var simg1=document.getElementById("simg1");
            var simg=document.getElementById("simg");
            function newsScroll() {
          
                if (scrollimg.parentNode.scrollLeft != (scrollimg.clientWidth / 2))
                    scrollimg.parentNode.scrollLeft++;
                else
                    scrollimg.parentNode.scrollLeft = 0
            }
            window.onload = function() {
           
                simg1.innerHTML = simg.innerHTML
           
                tm = setInterval('newsScroll()', 20)
            }
            function stop() {
                clearInterval(tm)
            }

            function start() {
                tm = setInterval('newsScroll()', 20)
            }
            </script>

        </div>