document.getElementById("layerOne").scrollLeft 一直为0

Question

<div class="data_area_body" id="layerOne" style="overflow: hidden; height:160px; width:100px;"> 
  <div class="data_area_body" id="layerTwo"> 
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 。。
  </div> 
  <div class="data_area_body" id="layerThree"> </div> 
</div> <script language="javascript"> 
var t = 0;
var iFrequency = 50; // 定义帧频率. 
var layerWidth = 1000; // 定义滚动区域的宽度. 
var timerLeft; // 定义时间句柄. //图片左移 
if(document.getElementById("layerTwo").offsetWidth >= layerWidth) 
{ 
document.getElementById("layerOne").style.width = layerWidth; 
} 
else 
{ 
//document.getElementById("layerOne").style.width = document.getElementById("layerTwo").offsetWidth; 
document.getElementById("layerOne").style.width = 200 + 'px';
} 
document.getElementById("layerThree").innerHTML = document.getElementById("layerTwo").innerHTML; //图片左移 
function moveLeft() 
{
if(document.getElementById("layerOne").scrollLeft >= document.getElementById("layerTwo").offsetWidth) 
{ 
document.getElementById("layerOne").scrollLeft -= (document.getElementById("layerTwo").offsetWidth - iFrame); } 
else 
{ 
document.getElementById("layerOne").scrollLeft ++;  //********此处 不执行？ document.getElementById("layerOne").scrollLeft 的值一直是0 } 
} timerLeft = setInterval("moveLeft()",iFrequency); 
document.getElementById("layerOne").onmouseover=function() {clearInterval(timerLeft);} 
document.getElementById("layerOne").onmouseout=function() {timerLeft=setInterval("moveLeft()",iFrequency);} </script> 

Answer 1

 内容宽度不够。
 
  谢谢 cgisir