function heoss_roller(objId,sec1,sec2,roll_time,height){ 
  this.objId=objId; 
  this.sec1=sec1; 
  this.sec2=sec2; 
  this.roll_time=roll_time; 
  this.height=height; 
  this.h=0; 
  this.div=document.getElementById(this.objId); 
  this.htmltxt=this.div.innerHTML; 
  this.div.innerHTML=this.htmltxt+this.htmltxt; 
  this.div.isover=false; 
  this.div.onmouseover=function(){this.isover=true;} 
  this.div.onmouseout=function(){this.isover=false;} 
  var self=this; 
  this.div.scrollTop=0; 
  window.setTimeout(function(){self.play()},this.sec1); 
} 
heoss_roller.prototype={ 
  play:function(){ 
    var self=this; 
    if(!this.div.isover){ 
      this.div.scrollTop+=this.roll_time; 
      if(this.div.scrollTop>this.div.scrollHeight/2){ 
        this.div.scrollTop=0; 
      }else{ 
        this.h+=this.roll_time; 
        if(this.h>=this.height){ 
          if(this.h>this.height|| this.div.scrollTop%this.height !=0){ 
            this.div.scrollTop-=this.h%this.height; 
          } 
          this.h=0; 
          window.setTimeout(function(){self.play()},this.sec1); 
          return; 
        } 
      } 
    } 
    window.setTimeout(function(){self.play()},this.sec2); 
  }, 
  prev:function(){ 
    if(this.div.scrollTop == 0) 
    this.div.scrollTop = this.div.scrollHeight/2; 
    this.div.scrollTop -= this.height; 
  }, 
  next:function(){ 
    if(this.div.scrollTop ==  this.div.scrollHeight/2) 
    this.div.scrollTop =0; 
    this.div.scrollTop += this.height; 
  } 
};