DIV滾動 滑鼠移至上方效果

JS方法<script language="javascript" type="text/javascript">//無間斷滾動function Marquee(){ this.ID = document.getElementById(arguments[0]); if(!this.ID) {  alert("您要設定的\"" + arguments[0] + "\"初始化錯誤\r\n請檢查標籤ID設定是否正確!");  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; }}</script>調用JS<script type="text/javascript" language="javascript">         var nowcomment = new Marquee("now_comment");  //初始化類         var nowcomment = new Marquee("now_comment");  //初始化類         nowcomment.Direction = "top";   //滾動方向 (可選,預設為0向上滾動)"top","bottom","left","right"         nowcomment.Step = 1;            //滾動的步長 (可選,預設值為2,數值越大,滾動越快)         nowcomment.Width = 520;         //容器可視寬度 (可選,預設值為容器初始設定的寬度)         nowcomment.Height = 180;         //容器可視高度 (可選,預設值為容器初始設定的高度)         nowcomment.Timer = 30;          //定時器  (可選,預設值為30,數值越小,滾動的速度越快,1000=1秒,建議不小於20))         nowcomment.Start();</script>