// Hover.js
// Javascript Behaviour for the Hover Visual Effect
// Copyright (c) by Matthias Hertel, http://www.mathertel.de
// This work is licensed under a BSD style license. See http://www.mathertel.de/License.aspx
// ----- 
// 02.04.2006 created by Matthias Hertel
// 11.07.2007 enabling disabled elements
// 11.07.2007 enabling selected elements
// 28.12.2007 documentation

jcl.HoverBehavior = {
/// <summary>Implementation of  JavaScript based mouse hover effect.<br />
/// The hover behavior must be attached to the document level only once. 
/// To enable this effect it is necesary to just include this file.</summary>

// ----- Properties -----
_obj: null, /// <summary>The current hovered object.</summary>

// --- events

onmouseover: function(evt) {
  /// <summary>Handle mouseover event. If the object underneath the mousepointer
  /// is enabled for the hover effect the classname is extended by "Hover".</summary>
  var obj = evt.srcElement;

  if ((! jcl.isIE) && (obj != null) && (obj.attributes["hover"] != null))
     obj.hover = true;
  if ((obj != null) && (obj.hover != null) && (obj != jcl.HoverBehavior._obj) && 
  (obj.className.indexOf("disabled") < 0) && (obj.className.indexOf("selected") < 0)) {
    jcl.HoverBehavior._obj = obj;
    obj.className = obj.className + "Hover";
  } // if
}, // onmouseover


onmouseout: function(evt) {
  /// <summary>Handle mouseout event. Remove the hover effect from the object.</summary>
  var obj = evt.srcElement;
  if ((obj != null) && (obj == jcl.HoverBehavior._obj)) {
    var cn = obj.className.split(" ");
    cn[0] = cn[0].replace(/(Pushed|Hover)$/, "");
    obj.className = cn.join(" ");
    jcl.HoverBehavior._obj = null;
  } // if 
}, // onmouseout


onmousedown: function(evt) {
  /// <summary>Handle mousedown event. If the object underneath the mousepointer
  /// is enabled for the hover effect the classname is now extended by "Pushed".</summary>
  var obj = evt.srcElement;
  if (obj == jcl.HoverBehavior._obj)
    obj.className = obj.className.replace(/(Pushed|Hover)$/, "") + "Pushed";
}, // onmousedown


onmouseup: function(evt) {
  /// <summary>Handle mouseup event. If the object underneath the mousepointer
  /// is enabled for the hover effect the classname is un-"Pushed" and extended by "Hover".</summary>
  var obj = evt.srcElement;
  if (obj == jcl.HoverBehavior._obj)
    obj.className = obj.className.replace(/(Pushed|Hover)$/, "") + "Hover";
} // onmouseup

} // jcl.HoverBehavior

jcl.LoadBehaviour(document, jcl.HoverBehavior);