private BorderPane border_pane = null;
private BorderPane pane_center = null;
public InternalPopupPanel(Node node) {
this.node = node;
border_pane = new BorderPane();
pane_center = new BorderPane();
border_pane.setStyle(
"-fx-background-color: linear-gradient(#BABCC2, #828282);"
+ "-fx-border-radius: 2;"
+ "-fx-background-radius: 2;"
+ "-fx-effect: dropshadow(one-pass-box, black, 16, 0.0, 2, 2);"