JS上下、左右滚动代码（支持图片滚动）

【核心代码】

var Marquee=function(){this.ID=document.getElementById(arguments[0]);this.Direction=arguments[1];this.Step=arguments[2];this.BakStep=arguments[2];this.Width=arguments[3];this.HalfWidth=Math.round(arguments[3]/2);this.Height=arguments[4];this.Timer=arguments[5];this.DelayTime=arguments[6];this.WaitTime=arguments[7];if(arguments[8] || arguments[8]==0){this.ScrollStep=arguments[8];}else{this.ScrollStep=this.Direction>1?this.Width:this.Height;}this.Correct=0;this.CTL=0;this.StartID=0;this.Stop=0;this.MouseOver=0;this.ID.style.overflow="hidden";this.ID.style.overflowX="hidden";this.ID.style.overflowY="hidden";this.ID.noWrap=true;this.ID.style.width=this.Width "px";this.ID.style.height=this.Height "px";this.ClientScroll=this.Direction>1?parseInt(this.ID.scrollWidth):parseInt(this.ID.scrollHeight);this.ID.innerHTML =this.ID.innerHTML;this.IsNotOpera=(navigator.userAgent.toLowerCase().indexOf("opera")==-1);if(arguments.length>=8){this.Start(this,this.Timer,this.DelayTime,this.WaitTime);}}
Marquee.prototype.Start=function(msobj,timer,delaytime,waittime){
msobj.StartID=function(){msobj.Scroll();};
msobj.Continue=function(){if(msobj.MouseOver==1){setTimeout(msobj.Continue,delaytime);}else{clearInterval(msobj.TimerID);msobj.CTL=0;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.ID.onmousemove=function(evt){if(msobj.ScrollStep==0 && msobj.Direction>1){var event=null;if(window.event){event=window.event;if(msobj.IsNotOpera){msobj.EventLeft=event.srcElement.id==msobj.ID.id?parseInt(event.offsetX)-parseInt(msobj.ID.scrollLeft):parseInt(event.srcElement.offsetLeft)-parseInt(msobj.ID.scrollLeft) parseInt(event.offsetX);}else{msobj.ScrollStep=null;return;}}else{event=evt;msobj.EventLeft=parseInt(event.layerX)-parseInt(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);}};msobj.TimerID=setInterval(msobj.StartID,timer);};setTimeout(msobj.Begin,waittime);}
Marquee.prototype.Scroll=function(){if(this.Correct==0 && this.CTL>this.ClientScroll){this.ClientScroll=(this.Direction>1)?Math.round(parseInt(this.ID.scrollWidth)/2):Math.round(parseInt(this.ID.scrollHeight)/2);this.Correct=1;}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;}this.ID.scrollTop ="px";this.ID.scrollLeft ="px";}}