function couplet(){   
   if(arguments.length>=1) this.objID = document.getElementById(arguments[0]);   
   if(arguments.length>=2) this.divTop = arguments[1];   
   if(arguments.length>=3) this.divPlane = arguments[2];   
   if(arguments.length>=4) this.scrollDelay = arguments[4];   
   if(arguments.length>=5) this.waitTime = arguments[5];   
   if(!this.objID){   
   alert("对象名【"+ arguments[0] +"】无效，对联无法初始化，请检查对象名称是否正确！");   
   this.objID = null; return;   
   }else{   
   this.objID.style.position="absolute";   
   this.objID.style.display="block";   
   this.objID.style.zIndex=9999;   
   }   
   if("" == this.objID.style.top){   
   if(isNaN(this.divTop)){   
   alert("对象垂直位置(top)参数必须为数字。"); return;   
   }else{   
   this.objID.style.top = this.divTop+"px";   
   }   
   }   
   if("" == this.objID.style.left && "" == this.objID.style.right){   
   if(isNaN(this.divPlane)){   
   alert("对象水平位置(left||right)参数必须为数字。"); return;   
   }   
   if(this.divPlane>0) this.objID.style.left = this.divPlane+"px";   
   if(this.divPlane<0) this.objID.style.right = Math.abs(this.divPlane)+"px";   
   }   
   if(this.scrollDelay<15 || isNaN(this.scrollDelay)) this.scrollDelay = 15;   
   if(this.waitTime<500 || isNaN(this.waitTime)) this.waitTime = 500;   
   if(arguments.length>=1) this.start();   
   }   
   couplet.prototype.start = function(){   
   if(null == this.objID) return;   
   var objCouplet = this;   
   timer = this.scrollDelay;   
   objCouplet.lastScrollY = 0;   
   objCouplet.timerID = null;   
   objCouplet.startID = function(){   
   if("block" == objCouplet.objID.style.display){   
   objCouplet.run();   
   }else{   
   clearInterval(objCouplet.timerID);   
   }   
   }   
   objCouplet.Begin = function(){   
   objCouplet.timerID = setInterval(objCouplet.startID,timer);   
   }   
     
   setTimeout(objCouplet.Begin,this.waitTime);   
   }   
   couplet.prototype.run = function(){   
   if(document.documentElement && document.documentElement.scrollTop){   
   uu_scrY = parseFloat(document.documentElement.scrollTop);   
   }else if(document.body){   
   uu_scrY = parseFloat(document.body.scrollTop);   
   }   
   uu_divX = parseFloat(this.objID.style.top.replace("px",""));   
   uu_curTop = .1 * (uu_scrY - this.lastScrollY);   
   uu_curTop = uu_curTop>0?Math.ceil(uu_curTop):Math.floor(uu_curTop);   
   this.objID.style.top = parseFloat(uu_divX + uu_curTop) + "px";   
   this.lastScrollY += uu_curTop;   
   }