/*
 * menuDropdown.js - implements an dropdown menu based on a HTML list
 * Author: Dave Lindquist (http://www.gazingus.org)
 */

var currentMenu = null;

// Global menu timeout handle:
///////////////////////////////////////
var Timeout_ID = null;

if (!document.getElementById)
    document.getElementById = function() { return null; }

function initializeMenu(menuId, actuatorId) {
    var menu = document.getElementById(menuId);
    var actuator = document.getElementById(actuatorId);

    if (menu == null || actuator == null) return;

    //if (window.opera) return; // I'm too tired

    actuator.onmouseover = function() {
        // Do not close it
        clearTimeout(Timeout_ID);
        
        if (currentMenu == null) {
            this.showMenu();
        }
        else {
            currentMenu.style.visibility = "hidden";
            this.showMenu();
        }
    }
    
    actuator.onmouseout = function() {
        Timeout_ID = window.setTimeout('currentMenu.style.visibility = "hidden";',250);
    }
  
    actuator.onclick = function() {
        /*if (currentMenu == null) {
            this.showMenu();
        }
        else {
            currentMenu.style.visibility = "hidden";
            currentMenu = null;
        }*/

        return false;
    }

    actuator.showMenu = function() {
        menu.style.left = this.offsetLeft + "px";
        menu.style.top = this.offsetTop + this.offsetHeight + "px";
        menu.style.visibility = "visible";
        currentMenu = menu;
    }
    
    menu.onmouseover = function() {
        // Do not close it
        clearTimeout(Timeout_ID);
    }
    
    menu.onmouseout = function() {
        Timeout_ID = window.setTimeout('currentMenu.style.visibility = "hidden";',250);
    }
}