function setLogin(divid)
{
  document.getElementById(divid).style.left=document.documentElement.clientWidth/2+260+'px';
}
function changeAlpha(obj,type)
{
  if(type=='1')
  {
    obj.className='an31';
  }
  else
  {
    obj.className='an32';
  }
}
function changePic(obj,pic)
{
    obj.src='images/' + pic + ".gif";
}

function changeBorderPic()
{
  document.getElementById('ctm_left').style.height=document.body.scrollHeight;
  document.getElementById('ctm_right').style.height=document.body.scrollHeight;
}


function changeClass(cid)
{
  switch(cid)
  {
    case 6 : document.getElementById('g2').src="images/g2_2.jpg";
              document.getElementById('banner').src="images/flash2.jpg"; break;
    case 7 : document.getElementById('g3').src="images/g3_2.jpg"; 
              document.getElementById('banner').src="images/flash3.jpg"; break;
    case 8 : document.getElementById('g4').src="images/g4_2.jpg";
              document.getElementById('banner').src="images/flash4.jpg"; break;
    case 9 : document.getElementById('g5').src="images/g5_2.jpg";
              document.getElementById('banner').src="images/flash5.jpg"; break;
    case 10 : document.getElementById('g6').src="images/g6_2.jpg";
               document.getElementById('banner').src="images/flash6.jpg"; break;
    case 11 : document.getElementById('g7').src="images/g7_2.jpg";
               document.getElementById('banner').src="images/flash7.jpg"; break;
    default : document.getElementById('g1').src="images/g1_2.jpg";
               document.getElementById('banner').src="images/guanggao8.jpg"; break;
  }
}