document.write(new Array(0).join("<br>"))
 var init_pos1=last_pos1=Layer1.style.posTop
 setInterval(function scrollit(){
 target_pos1=document.documentElement.scrollTop+init_pos1
 step1=(target_pos1-last_pos1)/10|0
 Layer1.style.posTop+=step1
 last_pos1+=step1
 },1)