var dx, dy, doScroll, menuTimer;
doScroll = false;
dx = 0;
dy = 0;

function checkScroll1()
{
	document.getElementById("divMap_1").style.display = "none";
	document.getElementById("divMap_2").style.display = "none";
	document.getElementById("divMap_3").style.display = "none";
}

function checkScroll()
{
	if(frames['Conteudos'].document.getElementById('ContentMiddle').offsetHeight > 231)
	{
		document.getElementById("divMap_1").style.display = "block";
		document.getElementById("divMap_2").style.display = "block";
		document.getElementById("divMap_3").style.display = "block";
		document.getElementById("divMap_3").style.top=-250;
		dy=0;
	}
	else
	{
		document.getElementById("divMap_1").style.display = "none";
		document.getElementById("divMap_2").style.display = "none";
		document.getElementById("divMap_3").style.display = "none";
	}
}
function moveTop()
{
	if(doScroll && dy < 0)
	{
		dy += 11;
		frames['Conteudos'].document.getElementById('ContentMiddle').style.top = dy+ "px";
		menuTimer = setTimeout("moveTop();", 80);
		UpdateScrool();
	}
	else
	{
		document.getElementById("divMap_3").style.top=-250;
	}
}
function moveDown()
{
	/*alert("down");*/
	
	if(doScroll && frames['Conteudos'].document.getElementById('ContentMiddle').offsetTop <= (frames['Conteudos'].document.getElementById('ContentMiddle').offsetHeight -  221)*-1)
	{
		document.getElementById("divMap_3").style.top=-95;
		return;
	}
	/*alert(frames['Conteudos'].document.getElementById('ContentMiddle').offsetHeight);
	alert(dy);
	alert(doScroll);*/
	if(doScroll && dy < frames['Conteudos'].document.getElementById('ContentMiddle').offsetHeight)
	{
		dy -= 11;
		frames['Conteudos'].document.getElementById('ContentMiddle').style.top = dy+ "px";
		menuTimer = setTimeout("moveDown();", 80);
		UpdateScrool();
	}
}

function UpdateScrool()
{
	var global = parseInt((frames['Conteudos'].document.getElementById('ContentMiddle').offsetHeight -  221)*-1);
	var actual = parseInt(frames['Conteudos'].document.getElementById('ContentMiddle').offsetTop);
	var perc=0;
	perc = actual * 100;
	perc = perc / global;
	
	perc = perc / 100;
	perc = perc * 155;
	perc = Math.round(perc);

	perc = perc - 250;
	if(perc>-95)
	{
		perc = -95;
	}
	
	if(perc < -250)
	{
		perc=-250;
	}
	document.getElementById("divMap_3").style.top = perc;
}
function goDown()
{
	doScroll = true;
	moveDown();
}
function goTop()
{
	doScroll = true;
	moveTop();
}
function clearTimer() 
{
	clearTimeout(menuTimer);
	doScroll = false;
}