function chang_url(url,pagenum,id)
{
	if(id=="pinglun")
	{
		total = totalPing;
		current = currentPing;
	}
	if(id=="liuyan")
	{
		total = totalLiuyan;
		current = currentLiuyan;		
	}
	if(url=="pre"||url=="next")
	{
		if(url=="pre")
		{
			if(current-pagenum<pagenum)
			current = pagenum;
			else
			current = current-pagenum;
		}
		if(url=="next")
		{
			if(current+pagenum>total)
			current = total;
			else
			current = current+pagenum;
		}
		url = current;
	}
	else
	current = url;
	for(var i =1;i<=total;i++)
	{
//		document.getElementById(""+id+i).style.display = ""; //普通js版本
		$("#"+id+i).hide();//jquery版本
//		$("#"+id+i).fadeIn('fast');//jquery版本
		//document.getElementById("page"+i).style.color = "#F90";
	}
	if(total>pagenum)
	{
		var size = pagenum;
	}
	else
	var size = url;
//	alert(current);
	if(current<=size)
	{
		for(var i =1;i<=current;i++)
		{		
			$("#"+id+i).fadeIn('fast');//jquery版本		
		}
	}
	else
	{
		if(total==current)
		{			
			var lift = current%size-1;
//			alert(lift);
			for(var i =current-lift;i<=current;i++)
			{		
				$("#"+id+i).fadeIn('fast');//jquery版本		
			}
		}
		else
		{
			for(var i =current-size;i<=current;i++)
			{		
				$("#"+id+i).fadeIn('fast');//jquery版本		
			}			
		}
	}
	if(id=="pinglun")
	{
		totalPing = total;
		currentPing = current;
	}
	if(id=="liuyan")
	{
		totalLiuyan = total;
		currentLiuyan = current;
	}
	page_i = Math.ceil(current/pagenum);
	total_i = Math.ceil(total/pagenum);
//	alert(page_i);
//	alert(total_i);
	for(var i=1;i<=total_i;i++)
	{
		document.getElementById("page"+i).style.color = "#000";
	}
	document.getElementById("page"+page_i).style.color = "#F90";
}