/*MSClass (Class Of Marquee Scroll通用不间断滚动JS封装类) Ver 1.4*\  
 
　应用说明:页面包含该类
 
 创建实例:new Marquee("marquee",0,1,760,52,50,5000,3000)  
   new Marquee("marquee",0,1,760,104,50,5000,3000,52)  
 
 参数说明:marquee 容器ID  
   0  向上滚动(0向上 1向下 2向左 3向右)  
   1  滚动的步长(数值越大,滚动越快)  
   760  容器可视宽度  
   52  容器可视高度  
   50  定时器(数值越小,滚动的速度越快 1000=1秒,建议不小于20)  
   5000  间歇停顿延迟时间(0为不停顿,1000=1秒)  
   3000  开始时的等待时间(0为不等待,1000=1秒)  
   (52)  间歇滚动间距(可选,该数值与延迟均为0则为鼠标悬停控制)  
　使用建议:  
  1、建议直接赋予容器的显示区域的宽度和高度，如(<div id="marquee" style="width:760px;height:52px;">......</div>)  
  2、建议为容器添加样式overflow = auto，如(<div id="marquee" style="width:760px;height:52px;overflow:auto;">......</div>)  
  3、为了更准确的获取滚动区域的宽度和高度，请尽可能将各滚动单位直接赋予正确宽高度  
  4、对于TABLE标记的横向滚动，需要对TABLE添加样式display = inline，如(<div id="marquee" style="width:760px;height:52px;overflow:auto;"><table style="display:inline">......</table></div>)  
  5、对于翻屏滚动或间歇滚动，要注意各滚动单位间的间距，同时需要对容器的可视高度和可视宽度做好准确的设置，对于各滚动单位间的间距可以通过设置行间距或者单元格的高宽度来进行调整  
  6、对于LI自动换行的问题暂时没有更好的解决办法，建议将其转换成表格(TABLE)的形式来达到同等的效果 
*/


function MarQScroll()   
{   
 this.ID = document.getElementById(arguments[0]);
 this.Direction = arguments[1];   
 this.Step = 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 = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
 this.ID.style.overflow = this.ID.style.overflowX = 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 ? this.ID.scrollWidth : 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);   
}   
  
MarQScroll.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 = 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(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);   
       }   
      }   
   msobj.TimerID = setInterval(msobj.StartID,timer);   
  }   
 setTimeout(msobj.Begin,waittime);   
}   
  
MarQScroll.prototype.Scroll = function()   
{   
 if(this.Correct == 0 && this.CTL > this.ClientScroll)   
 {   
  this.ClientScroll = this.Direction > 1 ? Math.round(this.ID.scrollWidth / 2) : Math.round(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;   
 }   
}