function Adjust(X,Y,x,y,z,w)
{
	var offset=268435456;
	var radius=offset/Math.PI;

	function LToX(x)
	{
		return Math.round(offset+radius*x*Math.PI/180);
	}

	function LToY(y)
	{
		return Math.round(offset-radius*Math.log((1+Math.sin(y*Math.PI/180))/(1-Math.sin(y*Math.PI/180)))/2);
	}

	function XToL(x)
	{
		return ((Math.round(x)-offset)/radius)*180/Math.PI;
	}

	function YToL(y)
	{
		return (Math.PI/2-2*Math.atan(Math.exp((Math.round(y)-offset)/radius)))*180/Math.PI;
	}

	if (w)
	{
		return {x:(LToX(X)-LToX(x))>>(21-z),y:(LToY(Y)-LToY(y))>>(21-z)};
	}

	else
	{
		return {x:XToL(LToX(x)+(X<<(21-z))),y:YToL(LToY(y)+(Y<<(21-z)))};
	}
}

function XYToLL(X,Y,x,y,z){return Adjust(X,Y,x,y,z,0)}

//	X = X pixel offset of new map center from old map center
//	Y = Y pixel offset of new map center from old map center
//	x = Longitude of map center
//	y = Latitude  of map center
//	z = Zoom level

//	result.x = Longitude of adjusted map center
//	result.y = Latitude  of adjusted map center

function LLToXY(X,Y,x,y,z){return Adjust(X,Y,x,y,z,1)}

//	X = Longitude of marker center
//	Y = Latitude  of marker center
//	x = Longitude of map center
//	y = Latitude  of map center
//	z = Zoom level

//	result.x = X pixel offset of marker center from map center
//	result.y = Y pixel offset of marker center from map center