var birdy;
var lastPos = {left:-50,top:-50};

function moveBird(evt)
{
	if( typeof(birdy) == "undefined" )
	{
		birdy = $("birdy");
	}
	var offset = document.viewport.getScrollOffsets();
	window.status = offset;
	birdy.style.left = (offset.left+evt.x+10)+"px";
	birdy.style.top = (offset.top+evt.y+15)+"px";
}

function init()
{
	Event.observe(window, 'mousemove', moveBird, false);
}