function ScrollText(content,btnPrevious,btnNext,autoStart,timeout,isSmoothScroll)
{
    this.Speed = 10;
    this.Timeout = timeout;
this.stopscroll =false;//是否停止滚动的标志位
this.isSmoothScroll= isSmoothScroll;//是否平滑连续滚动
    this.LineHeight = 20;//默认高度。可以在外部根据需要设置
    this.NextButton = this.$(btnNext);
    this.PreviousButton = this.$(btnPrevious);
    this.ScrollContent = this.$(content);
    this.ScrollContent.innerHTML += this.ScrollContent.innerHTML;//为了平滑滚动再加一遍

if(this.PreviousButton)
{
   this.PreviousButton.onclick = this.GetFunction(this,"Previous"); 
   this.PreviousButton.onmouseover = this.GetFunction(this,"MouseOver");
   this.PreviousButton.onmouseout = this.GetFunction(this,"MouseOut");
}
if(this.NextButton){
   this.NextButton.onclick = this.GetFunction(this,"Next");
   this.NextButton.onmouseover = this.GetFunction(this,"MouseOver");
   this.NextButton.onmouseout = this.GetFunction(this,"MouseOut");
    }
    this.ScrollContent.onmouseover = this.GetFunction(this,"MouseOver");
    this.ScrollContent.onmouseout = this.GetFunction(this,"MouseOut");

    if(autoStart)
    {
        this.Start();
    }
}

ScrollText.prototype = {

$:function(element)
{
   return document.getElementById(element);
},
Previous:function()
{
   this.stopscroll = true;
   this.Scroll("up");
},
Next:function()
{
   this.stopscroll = true;
   this.Scroll("down");
},
Start:function()
{
   if(this.isSmoothScroll)
   {
    this.AutoScrollTimer = setInterval(this.GetFunction(this,"SmoothScroll"), this.Timeout);
   }
   else
   { 
    this.AutoScrollTimer = setInterval(this.GetFunction(this,"AutoScroll"), this.Timeout);
   }
},
Stop:function()
{
   clearTimeout(this.AutoScrollTimer);
   this.DelayTimerStop = 0;
},
MouseOver:function()
{ 
   this.stopscroll = true;
},
MouseOut:function()
{
   this.stopscroll = false;
},
AutoScroll:function()
{
   if(this.stopscroll) 
   {
    return;
   }
   this.ScrollContent.scrollTop++;
   if(parseInt(this.ScrollContent.scrollTop) % this.LineHeight != 0)
   {
    this.ScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Speed);
   }
   else
   {
    if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2)
    {
     this.ScrollContent.scrollTop = 0;
    }
    clearTimeout(this.ScrollTimer);
    //this.AutoScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Timeout);
   }
},
SmoothScroll:function()
{
   if(this.stopscroll) 
   {
    return;
   }
   this.ScrollContent.scrollTop++;
   if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2)
   {
    this.ScrollContent.scrollTop = 0;
   }
},
Scroll:function(direction)
{

   if(direction=="up")
   {
    this.ScrollContent.scrollTop--;
   }
   else
   {
    this.ScrollContent.scrollTop++;
   }
   if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2)
   {
    this.ScrollContent.scrollTop = 0;
   }
   else if(parseInt(this.ScrollContent.scrollTop)<=0)
   {
    this.ScrollContent.scrollTop = parseInt(this.ScrollContent.scrollHeight) / 2;
   }

   if(parseInt(this.ScrollContent.scrollTop) % this.LineHeight != 0)
   {
    this.ScrollTimer = setTimeout(this.GetFunction(this,"Scroll",direction), this.Speed);
   }
},
GetFunction:function(variable,method,param)
{
   return function()
   {
    variable[method](param);
   }
}
}

function ignoreError() {
return true;
}
window.onerror = ignoreError;