/*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 = "100%";    //this.width + "px";   
 if(document.getelementbyid("hidlayouttag").value=='2'){
    this.id.style.height = "100%";
 }else{
    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;   
 }   
}