var stopscroll1 = false; 
var scrollElem1 = document.getElementById("cust"); 
var marqueesHeight1 = scrollElem1.style.height; 
scrollElem1.onmouseover = new Function('stopscroll1 = true'); 
scrollElem1.onmouseout = new Function('stopscroll1 = false'); 
var preTop1 = 0; 
var currentTop1 = 0; 
var stoptime1 = 0; 
var leftElem1 = document.getElementById("cust");  
scrollElem1.appendChild(leftElem1.cloneNode(true)); 
init_srolltext1(); 

function init_srolltext1(){ 
 scrollElem1.scrollTop = 0; 
 setInterval('scrollUp1()', 60);//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 scrollUp1(){ 
 if(stopscroll1) return; 
 currentTop1 += 2; //设为1, 可以实现间歇式的滚动; 设为2, 则是连续滚动 
 if(currentTop1 == 50) { 
 stoptime1 += 1; 
 currentTop1 -= 1; 
 if(stoptime1 == 180) { 
 currentTop1 = 0; 
 stoptime1 = 0; 
 } 
 }else{ 
 preTop1 = scrollElem1.scrollTop; 
 scrollElem1.scrollTop += 1; 
 if(preTop1 == scrollElem1.scrollTop){ 
 scrollElem1.scrollTop = 0; 
 scrollElem1.scrollTop += 1; 
 } 
 } 
}