function Tree(id, sp) {
	var sp = sp ? '_'+sp : '';
	if($('I_'+id).src.indexOf('down') == -1) {
		$('I_'+id).src = 'http://www.sino-europe.com/skin/en/image/arrow_down'+sp+'.gif';
		if($('act_'+id)!=null)
		    {  
		      $('act_'+id).innerHTML = '关闭';
			}
		$('D_'+id).style.display='';
	} else {
		$('I_'+id).src = 'http://www.sino-europe.com/skin/en/image/arrow_up'+sp+'.gif';
		$('D_'+id).style.display='none';
		if($('act_'+id)!=null)
		    {
	        $('act_'+id).innerHTML = '展开';
			}

	}
}