<!--

var auto_targetScroll = 0;
var auto_Interval;
var auto_Delay = 3000; // 停留时间
var auto_Speed = 50; // 滚动速度
var auto_Grating = 0.3; // 摩擦力

function auto_divScrolling ()
{
	obj = document.getElementById("auto_divScroll");
	if ( obj.scrollTop == auto_targetScroll )
	{
		clearTimeout ( auto_Interval );
		setTimeout ( "auto_divScrollDown()", auto_Delay );
	}
	else
	{
		if ( obj.scrollTop > auto_targetScroll )
		{
			obj.scrollTop -= Math.max ( 1, ( obj.scrollTop - auto_targetScroll ) * auto_Grating );
		}
		else
		{
			obj.scrollTop += Math.max ( 1, ( auto_targetScroll - obj.scrollTop ) * auto_Grating );
		}
		auto_Interval = setTimeout ( "auto_divScrolling()", auto_Speed );
	}
}

function auto_divScrollDown()
{
	obj = document.getElementById("auto_divScroll");
	if ( auto_targetScroll + obj.offsetHeight > obj.scrollHeight - obj.offsetHeight )
	{
		auto_targetScroll = 0;
	}
	else
	{
		auto_targetScroll = auto_targetScroll + obj.offsetHeight;
	}
	auto_divScrolling ();	
}

function auto_divScrollStart ()
{
	setTimeout ( "auto_divScrollDown()", auto_Delay );
}

var targetScroll = 0;
var Interval;
var Speed = 50; // 滚动速度
var Grating = 0.3; // 摩擦力

function divScrolling ()
{
	obj = document.getElementById("divScroll");
	if ( obj.scrollTop == targetScroll )
	{
		clearTimeout ( Interval );
	}
	else
	{
		if ( obj.scrollTop > targetScroll )
		{
			obj.scrollTop -= Math.max ( 1, ( obj.scrollTop - targetScroll ) * Grating );
		}
		else
		{
			obj.scrollTop += Math.max ( 1, ( targetScroll - obj.scrollTop ) * Grating );
		}
		Interval = setTimeout ( "divScrolling()", Speed );
	}
}

function divScrollUp()
{
	obj = document.getElementById("divScroll");
	targetScroll = Math.max ( 0, targetScroll - obj.offsetHeight );
	divScrolling ();
}

function divScrollDown()
{
	obj = document.getElementById("divScroll");
	targetScroll = Math.min ( obj.scrollHeight - obj.offsetHeight, targetScroll + obj.offsetHeight );
	divScrolling ();
}
//-->