function openScreenShot(g,x,w,h) {
	var aw = (w?w:800);
	var ah = (h?h:600);
	window.open('/spain/juegos/screenshot.aspx?g='+escape(g)+'&x='+x+'&w='+aw+'&h='+ah,'screenshots','width='+aw+',height='+ah+',screenX=' + centerWindowX(800) + ',screenY=' + centerWindowY(600) + ',top=' + centerWindowY(600) + ',left=' + centerWindowX(800));
}
function centerWindowX(width)
{
	if (document.all) 
		var xMax = screen.width;
	else if (document.layers) 
		var xMax = window.outerWidth + window.screenX; 
	else 
		var xMax = 800; 

	return (xMax - width)/2; 
}

function centerWindowY(height)
{
	if (document.all) 
		var yMax = screen.height; 
	else if (document.layers) 
		var yMax = window.outerHeight + window.screenY; 
	else 
		var yMax = 600; 

	return (yMax - height)/2; 
}