function popup(width, height, url, name ) {
	screenWidth = screen.width;
	screenHeight = screen.height;

	popupLeft = ( screenWidth / 2 ) - ( width / 2 );
	popupTop = ( screenHeight / 2 ) - ( height / 2 );

	myWindow = window.open(url,name,"toolbar=no,scrollbars=no,location=no,status=no,menubar=no,width=" + width + ",height=" + height + ",left=" + popupLeft + ",top=" + popupTop );
	myWindow.focus();
}