var currId1 = 'NewProduct_1_o';
var currId2 = 'day_Product_1_o';
var currId3 = 'BiaoProduct_1_o';
function changTop1(newId)
{
	if( currId1!=null)
    {
	  document.getElementById(currId1).style.display="none";
	  document.getElementById(currId1+'_t').style.display="block";
	}	
	document.getElementById(newId).style.display="block";
	document.getElementById(newId+'_t').style.display="none";
	currId1 = newId;
}