<style type="text/css"> #shi { font-size:25px; color:#09F; height:25px; font-weight:bold; 500px; } </style> </head> <body> <div id="wai" style="0px; height:26px; overflow:hidden"> <div id="shi">安得广厦千万间，大庇天下寒士俱欢颜</div> </div> </body> <script type="text/javascript"> showshi(); function showshi() { var s= document.getElementById("wai"); if(parseInt(s.style.width)<500) { var w=parseInt(s.style.width)+1; s.style.width=w+"px"; window.setTimeout("showshi()",20); } } </script>