function  secBoard(n,id)
{
document.getElementById("more").innerHTML="<img src='img/sjc106.gif' align='absmiddle'> <a href=\"/article/c_"+id+"\">更多</a>"	
  for(i=0;i<2;i++){
	document.getElementById("search"+i).className="title_2";
	document.getElementById("mainTable"+i).style.display="none";
  }
	document.getElementById("search"+n).className="title_1";
	document.getElementById("mainTable"+n).style.display="block";
}
function  secsb(n)
{
for(i=0;i<3;i++)
document.getElementById("search"+i).className="title_2";
document.getElementById("search"+n).className="title_1";

for(i=0;i<mainTable.tBodies.length;i++)
mainTable.tBodies[i].style.display="none";
mainTable.tBodies[n].style.display="block";
}