文字上下左右滚动

html代码

<ul id="nav">
<li>· 今生因你痴狂，此爱天下无双</li>
<li>· 今生因你痴狂，此爱天下无双</li>
<li>· 今生因你痴狂，此爱天下无双</li>
<li>· 今生因你痴狂，此爱天下无双</li>
</ul>

css  代码

<style type="text/css">
*{margin:0; padding: 0;}
#nav{ margin: 0 auto; width: 240px; height: 65px; border:1px solid #585555; overflow:hidden;}
#nav li{list-style: none; line-height: 1.5;padding-left: 10px;}
</style>

js  代码：

<script type="text/javascript">new Marquee("nav",0,1,240,65,50,0,1000,264)</script>

链接外部文件：<script type="text/javascript" language="javascript" src="js/common.js"></script>

这个函数可以放在common.js 中

function Marquee(){this.ID=document.getElementById(arguments[0]);if(!this.ID){alert("您要设置的\""+arguments[0]+"\"初始化错误\r\n请检查标签ID设置是否正确!");this.ID=-1;return};this.Direction=this.Width=this.Height=this.DelayTime=this.WaitTime=this.CTL=this.StartID=this.Stop=this.MouseOver=0;this.Step=1;this.Timer=30;this.DirectionArray={"top":0,"up":0,"bottom":1,"down":1,"left":2,"right":3};if(typeof arguments[1]=="number"||typeof arguments[1]=="string")this.Direction=arguments[1];if(typeof arguments[2]=="number")this.Step=arguments[2];if(typeof arguments[3]=="number")this.Width=arguments[3];if(typeof arguments[4]=="number")this.Height=arguments[4];if(typeof arguments[5]=="number")this.Timer=arguments[5];if(typeof arguments[6]=="number")this.DelayTime=arguments[6];if(typeof arguments[7]=="number")this.WaitTime=arguments[7];if(typeof arguments[8]=="number")this.ScrollStep=arguments[8];this.ID.style.overflow=this.ID.style.overflowX=this.ID.style.overflowY="hidden";this.ID.noWrap=true;this.IsNotOpera=(navigator.userAgent.toLowerCase().indexOf("opera")==-1);if(arguments.length>=7)this.Start()};Marquee.prototype.Start=function(){if(this.ID==-1)return;if(this.WaitTime<800)this.WaitTime=800;if(this.Timer<20)this.Timer=20;if(this.Width==0)this.Width=parseInt(this.ID.style.width);if(this.Height==0)this.Height=parseInt(this.ID.style.height);if(typeof this.Direction=="string")this.Direction=this.DirectionArray[this.Direction.toString().toLowerCase()];this.HalfWidth=Math.round(this.Width/2);this.HalfHeight=Math.round(this.Height/2);this.BakStep=this.Step;this.ID.style.width=this.Width+"px";this.ID.style.height=this.Height+"px";if(typeof this.ScrollStep!="number")this.ScrollStep=this.Direction>1?this.Width:this.Height;var templateLeft="<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;display:inline;'><tr><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td></tr></table>";var templateTop="<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;'><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";var msobj=this;msobj.tempHTML=msobj.ID.innerHTML;if(msobj.Direction<=1){msobj.ID.innerHTML=templateTop.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML)}else{if(msobj.ScrollStep==0&&msobj.DelayTime==0){msobj.ID.innerHTML+=msobj.ID.innerHTML}else{msobj.ID.innerHTML=templateLeft.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML)}};var timer=this.Timer;var delaytime=this.DelayTime;var waittime=this.WaitTime;msobj.StartID=function(){msobj.Scroll()};msobj.Continue=function(){if(msobj.MouseOver==1){setTimeout(msobj.Continue,delaytime)}else{clearInterval(msobj.TimerID);msobj.CTL=msobj.Stop=0;msobj.TimerID=setInterval(msobj.StartID,timer)}};msobj.Pause=function(){msobj.Stop=1;clearInterval(msobj.TimerID);setTimeout(msobj.Continue,delaytime)};msobj.Begin=function(){msobj.ClientScroll=msobj.Direction>1?msobj.ID.scrollWidth/2:msobj.ID.scrollHeight/2;if((msobj.Direction<=1&&msobj.ClientScroll<=msobj.Height+msobj.Step)||(msobj.Direction>1&&msobj.ClientScroll<=msobj.Width+msobj.Step)){msobj.ID.innerHTML=msobj.tempHTML;delete(msobj.tempHTML);return};delete(msobj.tempHTML);msobj.TimerID=setInterval(msobj.StartID,timer);if(msobj.ScrollStep<0)return;msobj.ID.onmousemove=function(event){if(msobj.ScrollStep==0&&msobj.Direction>1){var event=event||window.event;if(window.event){if(msobj.IsNotOpera){msobj.EventLeft=event.srcElement.id==msobj.ID.id?event.offsetX-msobj.ID.scrollLeft:event.srcElement.offsetLeft-msobj.ID.scrollLeft+event.offsetX}else{msobj.ScrollStep=null;return}}else{msobj.EventLeft=event.layerX-msobj.ID.scrollLeft};msobj.Direction=msobj.EventLeft>msobj.HalfWidth?3:2;msobj.AbsCenter=Math.abs(msobj.HalfWidth-msobj.EventLeft);msobj.Step=Math.round(msobj.AbsCenter*(msobj.BakStep*2)/msobj.HalfWidth)}};msobj.ID.onmouseover=function(){if(msobj.ScrollStep==0)return;msobj.MouseOver=1;clearInterval(msobj.TimerID)};msobj.ID.onmouseout=function(){if(msobj.ScrollStep==0){if(msobj.Step==0)msobj.Step=1;return};msobj.MouseOver=0;if(msobj.Stop==0){clearInterval(msobj.TimerID);msobj.TimerID=setInterval(msobj.StartID,timer)}}};setTimeout(msobj.Begin,waittime)};Marquee.prototype.Scroll=function(){switch(this.Direction){case 0:this.CTL+=this.Step;if(this.CTL>=this.ScrollStep&&this.DelayTime>0){this.ID.scrollTop+=this.ScrollStep+this.Step-this.CTL;this.Pause();return}else{if(this.ID.scrollTop>=this.ClientScroll){this.ID.scrollTop-=this.ClientScroll};this.ID.scrollTop+=this.Step};break;case 1:this.CTL+=this.Step;if(this.CTL>=this.ScrollStep&&this.DelayTime>0){this.ID.scrollTop-=this.ScrollStep+this.Step-this.CTL;this.Pause();return}else{if(this.ID.scrollTop<=0){this.ID.scrollTop+=this.ClientScroll};this.ID.scrollTop-=this.Step};break;case 2:this.CTL+=this.Step;if(this.CTL>=this.ScrollStep&&this.DelayTime>0){this.ID.scrollLeft+=this.ScrollStep+this.Step-this.CTL;this.Pause();return}else{if(this.ID.scrollLeft>=this.ClientScroll){this.ID.scrollLeft-=this.ClientScroll};this.ID.scrollLeft+=this.Step};break;case 3:this.CTL+=this.Step;if(this.CTL>=this.ScrollStep&&this.DelayTime>0){this.ID.scrollLeft-=this.ScrollStep+this.Step-this.CTL;this.Pause();return}else{if(this.ID.scrollLeft<=0){this.ID.scrollLeft+=this.ClientScroll};this.ID.scrollLeft-=this.Step};break}}