/*======================================================================
 Javascript Menu 1.0
 Copyright (c) 2008 SCL Software (http://www.sclsoftware.com)
 You can use it freely as long as all copyright messages are intact.
======================================================================*/

if (typeof Scl == "undefined")
{
   var Scl = {};
}

(function()
{
   Scl.MenuItem = function(text, link, cssClass)
   {
       this.text = text;
       this.link = link;
       this.cssClass = cssClass;
   };

       Scl.Menu = function(menuWidth)
       {
           var instance = this;
           var menuDiv;
           var menuItems = new Array();
           var dockElement;
           var left = 0;
           var top = 0;
           var width = menuWidth ? menuWidth : 770;
           var height = 0;
           var hideThread;
           var fullVisible = false;
           var animationThread;
           var animationStart = 0;
           var animationEnd = 0;
           var ANIMATION_NONE = 0;
           var ANIMATION_VERTICAL = 1;
           this.animationType = ANIMATION_VERTICAL;
           this.animationSpeed = 10;
           this.animationStep = 15;
           this.margin = 10;
           this.menuCssClass = 'menu';
           this.menuItemCssClass = 'menuItem';
           this.rightToLeft = false;
           this.bottomToTop = false;
           this.hideTimeOut = 120;

               this.addItem = function(text, link, cssClass)
               {
                   menuItems.push(new Scl.MenuItem(text, link, cssClass));
               };

               this.dockTo = function(element)
               {
               addEvent(window, 'load', function(){ dockToElement(element); }, false);
               };

               this.showAt = function(element)
               {
                   initialize();

               var position = getPosition(element);
               position.y += (instance.bottomToTop) ? (height + instance.margin) * -1 : instance.margin + element.offsetHeight;

               show(position.x, position.y);
               };

               this.showAtPosition = function(x, y)
               {
                   initialize();
                   show(x, y);
               };

               this.hide = function()
               {
                   hideThread = setTimeout(hideMenu, instance.hideTimeOut);
               };

               function dockToElement(element)
               {
                   if(typeof(element) == 'string')
           {
               element = document.getElementById(element);
           }

           dockElement = element;
               addEvent(element, 'mouseover', showAtDockElement, false);
               addEvent(element, 'mouseout', instance.hide, false);
               };

               function showAtDockElement()
               {
               instance.showAt(dockElement);
               };

               function initialize()
               {
                   if(menuDiv == null)
                   {
                       createMenu();
                   }
               };

               function show(x, y)
               {
                   cancelHide();

               menuDiv.style.left = x + 'px';
               menuDiv.style.top = y + 'px';

               // Asignar para la animacion
               left = x;
               top = y;

               switch(instance.animationType)
               {
                   case ANIMATION_NONE:
                           menuDiv.style.display = 'block';
                           break;

                   default:
                           startAnimation(0, height);
                           break;
               }
               };

               function createMenu()
           {
           menuDiv = document.createElement('div');
           menuDiv.style.position = 'absolute';

               var innerDiv = document.createElement('div');
           menuDiv.appendChild(innerDiv);

           innerDiv.className = instance.menuCssClass;
           innerDiv.style.width = width + 'px';

               addEvent(menuDiv, 'mouseover', cancelHide, false);
               addEvent(menuDiv, 'mouseout', instance.hide, false);

               // Add items
               for(var i=0; i< menuItems.length; i++)
               {
                   var menuItemDiv = createMenuItem(menuItems[i]);
               innerDiv.appendChild(menuItemDiv);
               }

               // Add to the document
           document.body.appendChild(menuDiv);

               height = menuDiv.offsetHeight;
               };

               function createMenuItem(menuItem)
           {
           var menuItemDiv = document.createElement('div');
           menuItemDiv.className = menuItem.cssClass != null ? menuItem.cssClass : instance.menuItemCssClass;

           if(menuItem.link != null)
           {
               menuItemDiv.link = menuItem.link; // Crear la propiedad con el link para cada elemento
               menuItemDiv.onclick = function(){ window.location = menuItem.link; };
               var link = document.createElement('a');
               link.setAttribute('href', menuItem.link);
               link.appendChild(document.createTextNode(menuItem.text));
               menuItemDiv.appendChild(link);
           }

           return menuItemDiv;
               };

               function cancelHide()
               {
                   clearTimeout(hideThread);
                   hideThread = null;
               };

               function hideMenu()
               {
                   switch(instance.animationType)
               {
                   case ANIMATION_NONE:
                           menuDiv.style.display = 'none';
                           break;

                   default:
                           startAnimation(parseStyle(menuDiv.style.height), 0);
                           break;
               }
               };

               function parseStyle(value)
               {
                   return parseInt(value.substring(0, value.length-2));
               };

               function getPosition(element)
       {
           var posx = 0;
           var posy = 0;

           if (element.offsetParent)
           {
               do
               {
                   posx += element.offsetLeft;
                   posy += element.offsetTop;

                   if (!element.offsetParent)
                   {
                        break;
                   }
               }
               while (element = element.offsetParent)
           }
           else if (element.x)
           {
               posx += element.x;
               posy += element.y;
           }

           return {x:posx, y:posy};
       };

       function addEvent(element, evType, functionName, useCapture)
       {
           if(element.addEventListener)
           {
               element.addEventListener(evType, functionName, useCapture);
           }
           else if(element.attachEvent)
           {
               element.attachEvent('on' + evType , functionName);
           }
           else
           {
               element['on' + evType] = functionName;
           }
       };

               function startAnimation(start, end)
               {
           var showing = end > start;

                   if(showing & fullVisible)
                   {
                       return;
                   }

                   menuDiv.style.zIndex = showing ? 20 : 1;

                   animationStart = start;
                   animationEnd = end;
               menuDiv.style.overflow = 'hidden';
                   menuDiv.style.display = 'block';
               menuDiv.style.height = animationStart + 'px';

               fullVisible = false;

               clearInterval(animationThread);

           switch(instance.animationType)
               {
                   case ANIMATION_VERTICAL:
                       if(instance.bottomToTop)
                   {
                           menuDiv.style.top = (top + height - menuDiv.offsetHeight) + 'px';
                       }
                       animationThread = setInterval(animateVertical, instance.animationSpeed);
                           break;
               }
               };

       function animateVertical()
       {
           var showing = animationEnd > animationStart;

           var strHeight = menuDiv.style.height;
           var animationHeight = parseInt(strHeight.substring(0, strHeight.length-2));

           if((showing & animationHeight >= animationEnd) || (!showing & animationHeight <= animationEnd))
           {
               clearInterval(animationThread);

                       if(showing)
                       {
                           fullVisible = true;
                       }
                       else
                       {
                           menuDiv.style.display = 'none';
                       }
           }
           else
           {
               animationHeight += showing ? instance.animationStep : -instance.animationStep;

               if((showing & animationHeight > animationEnd) || (!showing & animationHeight < animationEnd))
               {
                   animationHeight = animationEnd;
               }

               menuDiv.style.height = animationHeight + 'px';

               if(instance.bottomToTop)
               {
                   menuDiv.style.top = (top + height - animationHeight) + 'px';
               }
           }
       };
       };
})();