function createWindow(url, WinName, theWidth, theHeight){

	var winLeft = (screen.width - theWidth) / 2;

	var winTop = (screen.height - theHeight) / 2;

	window.open(url, WinName, 'titlebar.maximize=no, status=no, scrollbars=yes, resizable=no, status=no, width=' + theWidth + ', height=' + theHeight + ', left=' + winLeft + ', top=' + winTop);

}