var Apple
var ScrollStart = 0
var ScrollDelta = 1
var ScrollRate  = 1
var ScrollFrom  = 200

window.onload = function()
{
	Apple = document.getElementById('waterMark')
	if( Apple )
	{
		Apple.style.top = GetScrollTop()
		Apple.style.left = (document.body.clientWidth + 778) / 2 - 100
		Apple.style.visibility = 'visible'
		window.onscroll = ScrollApple
		window.onresize = ScrollApple
	}
}

function ScrollApple( delta )
{
	if( parseInt(Apple.style.top) < GetScrollTop() )
	{
		window.setTimeout( ScrollAppleDown, ScrollStart )
	}
	else
	{
		window.setTimeout( ScrollAppleUp, ScrollStart )
	}
}

function ScrollAppleDown()
{
	var currPos = parseInt(Apple.style.top)
	if(
		currPos < GetScrollTop() &&
		currPos < ( document.body.scrollHeight)
	)
	{
		Apple.style.top = parseInt(Apple.style.top) + GetScrollDelta()
		window.setTimeout( ScrollAppleDown, GetScrollRate() )
	}
}

function ScrollAppleUp()
{
	var currPos = parseInt(Apple.style.top)
	if(
		currPos > GetScrollTop()
	)
	{
		window.setTimeout( ScrollAppleUp, GetScrollRate() )
		Apple.style.top = parseInt(Apple.style.top) - GetScrollDelta()
	}
}


function GetScrollTop()
{
	return document.body.scrollTop + ScrollFrom
}

function GetScrollRate()
{
	return ScrollRate
}

function GetScrollDelta()
{
	return ScrollDelta
}