if(item==undefined)alert("未指定对象");
function deleteVideo(id,alert)
{
//	var obj=$("video_"+id+"_name");
//	var result=confirm('你确定要删除 '+obj.innerHTML+' 吗?');
	var result=confirm('你确定要删除这个视频吗?');
	if(result==true)
	{
		Element.hide('video_'+id);
		new Ajax.Request('ajax.php?mod=video&code=delete',
			{
				method:'post',
				parameters:'id='+id+"&item="+item,
				onComplete:function (r)
				{
					var response=r.responseText.evalJson();
					if(response.result==true)
					{
						Element.remove('video_'+id);
//						showMsg("视频 "+obj.innerHTML+" 删除成功",'notify',2);
						showMsg("视频删除成功",'notify',2);
						return true;
					}
					else
					{
						alert(response.msg);
						Element.show('video_'+id);
						return false;
					}
				}
			}
		)
	}
	else
	{
		return false;
	}
}
function modifyDescription(id,reload)
{
	var obj=$("video_"+id+"_name");
	var oldName=obj.innerHTML;
//	var oldName='';
	var description2=prompt("修改视频标题",oldName);	
	if(description2===null)return false;
	Element.update(obj,description2);
	new Ajax.Request('ajax.php?mod=video&code=modify_description',
		{
			method:'post',
			parameters:'id='+id+'&description='+description2+"&item="+item,
			onComplete:function (r)
			{
				var response=r.responseText.evalJson();
				if(response.result!=true)
				{
					Element.update(obj,oldName);
					alert(response.msg);
				}
			}
		}
	)
	return false;
}