?var cantin=document.getElementById("cantin");

? var con1=document.getElementById("con1");

? var con2=document.getElementById("con2");

cantin.scrollTop = 0;

?con2.innerHTML=con2.innerHTML;

function scrollUp(){

var ? h=cantin.scrollTop ++;

?return ?h;

? ?}

alert(scrollUp);

var timer=setInterval("scrollUp",50);