//---------------------无缝滚动--------------------

var stopscroll = false;    
var scrollElem = document.getElementById("xlink");    //-----------------------参数1--布局容器--------------
var marqueesHeight = scrollElem.style.height;    
scrollElem.onmouseover = new Function('stopscroll = true');    
scrollElem.onmouseout  = new Function('stopscroll = false');    
var preTop = 0;    
var currentTop = 0;    
var stoptime = 0;    
var leftElem = document.getElementById("scrollLink");  //---------------------参数2--内容容器---------------  
scrollElem.appendChild(leftElem.cloneNode(true));    
init_srolltext();    
function init_srolltext(){    
 scrollElem.scrollTop = 0;    
 setInterval('scrollUp()', 115);//的面的这个参数25, 是确定滚动速度的, 数值越小, 速度越快    
}    
function scrollUp(){    
 if(stopscroll) return;    
 currentTop += 2; //设为1, 可以实现间歇式的滚动; 设为2, 则是连续滚动    
 if(currentTop == 19) {    
  stoptime += 1;    
  currentTop -= 1;    
  if(stoptime == 180) {    
   currentTop = 0;    
   stoptime = 0;    
  }    
 }else{    
  preTop = scrollElem.scrollTop;    
  scrollElem.scrollTop += 1;    
  if(preTop == scrollElem.scrollTop){    
   scrollElem.scrollTop = 0;    
   scrollElem.scrollTop += 1;    
  }    
 }    
}