/**
* En la primera parte estan las funciones de la version viejita de nice_menus.js por que la ultima no funciono bien con IE6
* En la segunda parte estan las funciones heredadas de drupal para complementar el funcionamiento en IE6
*/




// $Id: nice_menus.js,v 1.1.2.2 2006/08/06 10:16:20 jakeg Exp $

// We only do the javascript in IE.
// TODO: because we now only include the js file for IE, is this 'if' redundant?
if (document.all) {

  function IEHoverPseudo() {
    var ulNodes = getElementsByClass("nice-menu");
    var j = 0;
    var liNodes = null;

    if(ulNodes != null){
		for (var i = 0; i < ulNodes.length; i++) {
		  liNodes = ulNodes[i].getElementsByTagName("li");
		  for (j = 0; j < liNodes.length; j++) {
			if (hasClass(liNodes[j], 'menuparent')) {
			  liNodes[j].onmouseover=function() { addClass(this, 'over'); }
			  liNodes[j].onmouseout=function() { removeClass(this, 'over'); }
			} // if
		  } // for
		} // for
	} // if
  } // IEHoverPseudo

  function getElementsByClass(searchClass,node,tag) {
	  var classElements = new Array();
	  if (node == null) node = document;
	  if (tag == null) tag = '*';
	  var els = node.getElementsByTagName(tag);
	  var elsLen = els.length;
	  var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	  for (i = 0, j = 0; i < elsLen; i++) {
		  if (pattern.test(els[i].className)) {
			  classElements[j] = els[i];
			  j++;
		  }
	  }
	  return classElements;
  }

  // This is the Drupal method of adding a function to the BODY onload event.  (See misc/drupal.js)
  addLoadEvent(IEHoverPseudo);
}








/**
 * Adds a function to the window onload event
 */
function addLoadEvent(func) {
  var oldOnload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  }
  else {
    window.onload = function() {
      oldOnload();
      func();
    }
  }
}

/**
 * Adds a function to a given form's submit event
 */
function addSubmitEvent(form, func) {
  var oldSubmit = form.onsubmit;
  if (typeof oldSubmit != 'function') {
    form.onsubmit = func;
  }
  else {
    form.onsubmit = function() {
      return oldSubmit() && func();
    }
  }
}

/**
 * Retrieves the absolute position of an element on the screen
 */
function absolutePosition(el) {
  var sLeft = 0, sTop = 0;
  var isDiv = /^div$/i.test(el.tagName);
  if (isDiv && el.scrollLeft) {
    sLeft = el.scrollLeft;
  }
  if (isDiv && el.scrollTop) {
    sTop = el.scrollTop;
  }
  var r = { x: el.offsetLeft - sLeft, y: el.offsetTop - sTop };
  if (el.offsetParent) {
    var tmp = absolutePosition(el.offsetParent);
    r.x += tmp.x;
    r.y += tmp.y;
  }
  return r;
};

function dimensions(el) {
  return { width: el.offsetWidth, height: el.offsetHeight };
}

/**
 * Returns true if an element has a specified class name
 */
function hasClass(node, className) {
  if (node.className == className) {
    return true;
  }
  var reg = new RegExp('(^| )'+ className +'($| )')
  if (reg.test(node.className)) {
    return true;
  }
  return false;
}

/**
 * Adds a class name to an element
 */
function addClass(node, className) {
  if (hasClass(node, className)) {
    return false;
  }
  node.className += ' '+ className;
  return true;
}

/**
 * Removes a class name from an element
 */
function removeClass(node, className) {
  if (!hasClass(node, className)) {
    return false;
  }
  // Replaces words surrounded with whitespace or at a string border with a space. Prevents multiple class names from being glued together.
  node.className = eregReplace('(^|\\s+)'+ className +'($|\\s+)', ' ', node.className);
  return true;
}

/**
 * Toggles a class name on or off for an element
 */
function toggleClass(node, className) {
  if (!removeClass(node, className) && !addClass(node, className)) {
    return false;
  }
  return true;
}

/**
 * Emulate PHP's ereg_replace function in javascript
 */
function eregReplace(search, replace, subject) {
  return subject.replace(new RegExp(search,'g'), replace);
}

/**
 * Removes an element from the page
 */
function removeNode(node) {
  if (typeof node == 'string') {
    node = $(node);
  }
  if (node && node.parentNode) {
    return node.parentNode.removeChild(node);
  }
  else {
    return false;
  }
}