为什么我的scrollTop++没用呢
window.onload = function(){
var oGUN = document.getElementById("GUN") ;
var oUl1 = document.getElementById("ul1") ;
var oUl2 = document.getElementById("ul2") ;
oUl2.innerHTML = oUl1.innerHTML ;
oGUN.scrollTop = 0 ;
var timer = setInterval(scrollUp,50) ;
function scrollUp(){
if(oGUN.scrollTop >= oUl1.offsetHeight){
oGUN.scrollTop = 0 ;
}else{
oGUN.scrollTop++ ;
alert(oGUN.scrollTop);
}
}
}