// Avaa pop-up ikkunan
function openPopup(theURL, winName, features)
{
	args = openPopup.arguments;
	var iTop, iLeft;
	if (args[3])
		iTop = (screen.height-args[4])/2;
	if (args[4])
		iLeft = (screen.width-args[3])/2;
	if (features)
	{
		if (iTop)
			features += ",Height="+ args[4] +",Top="+ iTop;
		if (iLeft)
			features += ",Width="+ args[3] +",Left="+ iLeft;
	}
	else
	{
		if (iTop)
			features += "Height="+ args[4] +",Top="+ iTop;			
			
		if (iLeft)
		{
			if (iTop) 
				features += ",";
			features += "Width="+ args[3] +",Left="+ iLeft;
		}
	}
	newWindow = window.open(theURL, winName, features);
	newWindow.focus();
}