function gs(d,a){
if (d.currentStyle){ 
    var curVal=d.currentStyle[a]
}else{ 
    var curVal=document.defaultView.getComputedStyle(d, null)[a]
} 
return curVal;
}


var juli = 980;      //每一个片段移动多少像素
var sudu = 80;      //移动速度

function show(n)
{
 var site = parseInt(document.getElementById("neirong").style.left);
 if(!site)site=0;
 yidong(site,-(n-1)*juli);
}


function yidong(xz,js)
{
 
 if(xz > js)
 {
  xz = xz - sudu;
  if(xz-js<=sudu)xz=js
 }
 if(xz < js)
 {
  xz = xz + sudu
  if(js-xz<=sudu)xz=js
 }
 document.getElementById("neirong").style.left = xz+"px";
 
 
 var time_out = setTimeout("yidong("+xz+","+js+")",10);
 
 if(xz == js)
 {
  clearTimeout(time_out);
 }
}