var windowName

function selectPopUpWindow(filename) {

var destination =  filename;
 
windowName = window.open(destination, "windowName", "scrollbars=yes, resizable=yes, top=100, left=100, width=425, height=480");

	windowName.focus()
}

function closePopUpWindow()		{
	if (windowName && !windowName.closed)  {
		windowName.close();
	}
}