Sample HTML page with 4 Hierarchical Menus

Permanent Centered Menu (Cascades on click):

onMouseOver="HM_f_PopUp('elMenu1',event)"
onMouseOut="HM_f_PopDown('elMenu1')">
Relative-to-Mouse-Position Popup Menu (Displays on mouseover)

onMouseOver="HM_f_PopUp('elMenu4',event)"
onMouseOut="HM_f_PopDown('elMenu4')">
Relative-to-Mouse-Position Using Keywords Popup Menu (Displays on click)

onMouseOver="popUp('HM_Menu3',event)"
onMouseOut="popDown('HM_Menu3')">
Absolute Position Popup Menu (Displays on mouseover)