var currId = 'index_ranking_goods_0_o';


function changTop(newId)
{
	if(currId!=null)
    {
	  document.getElementById(currId).style.display="none";
	  document.getElementById(currId+'_t').style.display="block";
	}	
	document.getElementById(newId).style.display="block";
	document.getElementById(newId+'_t').style.display="none";
	currId = newId;
}