我这段文字滚动效果始终做不出啊，试了很多方式都没用，求助各位大侠了，在线等

<!DOCTYPE html>
<html>
    <head>
        <title>Welcome To Long's Resume</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <link href="InsideStyle.css" rel="stylesheet" />
        <link rel="stylesheet" href="960.css"/>
        <link rel="stylesheet" href="reset.css"/>
    </head>
    <body>
        <div class="container_12">
            <header>
                <div class="grid_12">         
                    <img src="banner.gif" class="ado"/>
                </div>
            </header>            <div class="grid_3">
                <img src="logo2.png" class="ad"/>
                <aside id="time">      
                    <span id=localtime></span>
                    <script type="text/javascript">
                        function showLocale(objD)
                        {
                            var str,colorhead,colorfoot;
                            var yy = objD.getYear();
                            if(yy<1900) yy = yy+1900;
                            var MM = objD.getMonth()+1;
                            if(MM<10) MM = '0' + MM;
                            var dd = objD.getDate();
                            if(dd<10) dd = '0' + dd;
                            var hh = objD.getHours();
                            if(hh<10) hh = '0' + hh;
                            var mm = objD.getMinutes();
                            if(mm<10) mm = '0' + mm;
                            var ss = objD.getSeconds();
                            if(ss<10) ss = '0' + ss;
                            var ww = objD.getDay();
                            if  ( ww==0 )  colorhead="<font color=\"#FF0000\">";
                            if  ( ww > 0 && ww < 6 )  colorhead="<font color=\"#373737\">";
                            if  ( ww==6 )  colorhead="<font color=\"#008000\">";
                            if  (ww==0)  ww="Sun";
                            if  (ww==1)  ww="Mon";
                            if  (ww==2)  ww="Tue";
                            if  (ww==3)  ww="Wed";
                            if  (ww==4)  ww="Thu";
                            if  (ww==5)  ww="Fri";
                            if  (ww==6)  ww="Sat";
                            colorfoot="</font>"
                            str = colorhead + yy + "-" + MM + "-" + dd + " " + hh + ":" + mm + ":" + ss + "  " + ww + colorfoot;
                            return(str);
                        }
                        function tick()
                        {
                            var today;
                            today = new Date();
                            document.getElementById("localtime").innerHTML = showLocale(today);
                            window.setTimeout("tick()", 1000);
                        }
                        tick();
                    </script>
                </aside>
            </div>
            <div class="grid_9">
                <nav id="mainnav">
                    <ul>
                        <li><a href="#">Summary</a></li>
                        <li><a href="#">Tech Skills</a></li>
                        <li><a href="#">Certification</a></li>
                        <li><a href="#">Professional Experience</a></li>
                        <li><a href="#">Education</a></li>
                    </ul>
                </nav>       
            </div>
            <div class="clear"></div>
            <div class="grid_3" id="photoandsum">
                <img src="53.png" class="photo"/>
                <div id=demo style=overflow:hidden;height:60px>
<div id="demo1">
                <p>       SUMMARY OF QUALIFICATIONS</p>
                <p>·Half year experience designing, developing, integrating and supporting corporate tools and applications.</p>
                <p>·Apply in-depth understanding of business and IT requirements to streamline administration and internal processes, resulting in enhanced automation and operational efficiency.</p>
                <p>·Manage multiple projects simultaneously. Learn and apply new technologies quickly.</p>
                <p>·Expert knowledge of numerous programming languages, including Visual Basic, Html, and C</p>
                <p>·Superior communication, presentation, analytical, and problem-solving skills.</p>
            </div>
                    <div id="demo2"></div>
                    <script>
var t=demo.scrollTop
demo2.innerText=demo1.innerText
function qswhMarquee(){
if(demo2.offsetTop-demo.scrollTop<=0)demo.scrollTop-=demo1.offsetHeight
else
demo.scrollTop++
}
setInterval(qswhMarquee,10)
</script></div>
                </div>
 </div>
    </body>
</html>