function getObject1(objectId) {
if(document.getElementById && document.getElementById(objectId)) {
return document.getElementById(objectId);
} else if (document.all && document.all(objectId)) {
return document.all(objectId);
} else if (document.layers && document.layers[objectId]) {
return document.layers[objectId];
} else {
return false;
}
}

function aaajian(n)
{
  for(var i=1;i<=4;i++)
  {
    if(i==n)
    {
      getObject1('jianjieban'+i).style.background='#e7f3ff';
      getObject1('jianjieban'+i).style.borderBottom='1px solid #e7f3ff';	///* 白色下边框，覆盖<ul>中的蓝色下边框 */#a3dbff
      //getObject('jianjieban'+i).style.borderLeft='1px solid #a3dbff';
      getObject1('ccontent'+i).style.display='';

    }
    else
    {
      getObject1('jianjieban'+i).style.background='#ffffff';
      getObject1('jianjieban'+i).style.borderBottom='1px solid #aaaaaa';
      getObject1('ccontent'+i).style.display='none';
    }
  }  
}