https://www.centrelectura.cat/cdlweb/wp-content/themes/cdltemplate/js/chrome.js

1//** Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
2
3//** Updated: July 14th 06' to v2.0
4	//1) Ability to "left", "center", or "right" align the menu items easily, just by modifying the CSS property "text-align".
5	//2) Added an optional "swipe down" transitional effect for revealing the drop down menus.
6	//3) Support for multiple Chrome menus on the same page.
7
8//** Updated: Nov 14th 06' to v2.01- added iframe shim technique
9
10//** Updated: July 23rd, 08 to v2.4
11	//1) Main menu items now remain "selected" (CSS class "selected" applied) when user moves mouse into corresponding drop down menu. 
12	//2) Adds ability to specify arbitrary HTML that gets added to the end of each menu item that carries a drop down menu (ie: a down arrow image).
13	//3) All event handlers added to the menu are now unobstrusive, allowing you to define your own "onmouseover" or "onclick" events on the menu items.
14	//4) Fixed elusive JS error in FF that sometimes occurs when mouse quickly moves between main menu items and drop down menus
15
16//** Updated: Oct 29th, 08 to v2.5 (only .js file modified from v2.4)
17	//1) Added ability to customize reveal animation speed (# of steps)
18	//2) Menu now works in IE8 beta2 (a valid doctype at the top of the page is required)
19
20var cssdropdown={
21disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
22dropdownindicator: '<img src="down.gif" border="0" />', //specify full HTML to add to end of each menu item with a drop down menu
23enablereveal: [false, 5], //enable swipe effect? [true/false, steps (Number of animation steps. Integer between 1-20. Smaller=faster)]
24enableiframeshim: 1, //enable "iframe shim" in IE5.5 to IE7? (1=yes, 0=no)
25
26//No need to edit beyond here////////////////////////
27
28dropmenuobj: null, asscmenuitem: null, domsupport: document.all || document.getElementById, standardbody: null, iframeshimadded: false, revealtimers: {},
29
30getposOffset:function(what, offsettype){
31	var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
32	var parentEl=what.offsetParent;
33	while (parentEl!=null){
34		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
35		parentEl=parentEl.offsetParent;
36	}
37	return totaloffset;
38},
39
40css:function(el, targetclass, action){
41	var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
42	if (action=="check")
43		return needle.test(el.className)
44	else if (action=="remove")
45		el.className=el.className.replace(needle, "")
46	else if (action=="add" && !needle.test(el.className))
47		el.className+=" "+targetclass
48},
49
50showmenu:function(dropmenu, e){
51	if (this.enablereveal[0]){
52		if (!dropmenu._trueheight || dropmenu._trueheight<10)
53			dropmenu._trueheight=dropmenu.offsetHeight
54		clearTimeout(this.revealtimers[dropmenu.id])
55		dropmenu.style.height=dropmenu._curheight=0
56		dropmenu.style.overflow="hidden"
57		dropmenu.style.visibility="visible"
58		this.revealtimers[dropmenu.id]=setInterval(function(){cssdropdown.revealmenu(dropmenu)}, 10)
59	}
60	else{
61		dropmenu.style.visibility="visible"
62	}
63	this.css(this.asscmenuitem, "selected", "add")
64},
65
66revealmenu:function(dropmenu, dir){
67	var curH=dropmenu._curheight, maxH=dropmenu._trueheight, steps=this.enablereveal[1]
68	if (curH<maxH){
69		var newH=Math.min(curH, maxH)
70		dropmenu.style.height=newH+"px"
71		dropmenu._curheight= newH + Math.round((maxH-newH)/steps) + 1
72	}
73	else{ //if done revealing menu
74		dropmenu.style.height="auto"
75		dropmenu.style.overflow="hidden"
76		clearInterval(this.revealtimers[dropmenu.id])
77	}
78},
79
80clearbrowseredge:function(obj, whichedge){
81	var edgeoffset=0
82	if (whichedge=="rightedge"){
83		var windowedge=document.all && !window.opera? this.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15
84		var dropmenuW=this.dropmenuobj.offsetWidth
85		if (windowedge-this.dropmenuobj.x < dropmenuW)  //move menu to the left?
86			edgeoffset=dropmenuW-obj.offsetWidth
87	}
88	else{
89		var topedge=document.all && !window.opera? this.standardbody.scrollTop : window.pageYOffset
90		var windowedge=document.all && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18
91		var dropmenuH=this.dropmenuobj._trueheight
92		if (windowedge-this.dropmenuobj.y < dropmenuH){ //move up?
93			edgeoffset=dropmenuH+obj.offsetHeight
94			if ((this.dropmenuobj.y-topedge)<dropmenuH) //up no good either?
95				edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
96		}
97	}
98	return edgeoffset
99},
100
101dropit:function(obj, e, dropmenuID){
102	if (this.dropmenuobj!=null) //hide previous menu
103		this.hidemenu() //hide menu
104	this.clearhidemenu()
105	this.dropmenuobj=document.getElementById(dropmenuID) //reference drop down menu
106	this.asscmenuitem=obj //reference associated menu item
107	this.showmenu(this.dropmenuobj, e)
108	this.dropmenuobj.x=this.getposOffset(obj, "left")
109	this.dropmenuobj.y=this.getposOffset(obj, "top")
110	this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
111	this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
112	this.positionshim() //call iframe shim function
113},
114
115positionshim:function(){ //display iframe shim function
116	if (this.iframeshimadded){
117		if (this.dropmenuobj.style.visibility=="visible"){
118			this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
119			this.shimobject.style.height=this.dropmenuobj._trueheight+"px"

120			this.shimobject.style.left=parseInt(this.dropmenuobj.style.left)+"px"
121			this.shimobject.style.top=parseInt(this.dropmenuobj.style.top)+"px"
122			this.shimobject.style.display="block"
123		}
124	}
125},
126
127hideshim:function(){
128	if (this.iframeshimadded)
129		this.shimobject.style.display='none'
130},
131
132isContained:function(m, e){
133	var e=window.event || e
134	var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
135	while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
136	if (c==m)
137		return true
138	else
139		return false
140},
141
142dynamichide:function(m, e){
143	if (!this.isContained(m, e)){
144		this.delayhidemenu()
145	}
146},
147
148delayhidemenu:function(){
149	this.delayhide=setTimeout("cssdropdown.hidemenu()", this.disappeardelay) //hide menu
150},
151
152hidemenu:function(){
153	this.css(this.asscmenuitem, "selected", "remove")
154	this.dropmenuobj.style.visibility='hidden'
155	this.dropmenuobj.style.left=this.dropmenuobj.style.top="-1000px"
156	this.hideshim()
157},
158
159clearhidemenu:function(){
160	if (this.delayhide!="undefined")
161		clearTimeout(this.delayhide)
162},
163
164addEvent:function(target, functionref, tasktype){
165	if (target.addEventListener)
166		target.addEventListener(tasktype, functionref, false);
167	else if (target.attachEvent)
168		target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
169},
170
171startchrome:function(){
172	if (!this.domsupport)
173		return
174	this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
175	for (var ids=0; ids<arguments.length; ids++){
176		var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
177		for (var i=0; i<menuitems.length; i++){
178			if (menuitems[i].getAttribute("rel")){
179				var relvalue=menuitems[i].getAttribute("rel")
180				var asscdropdownmenu=document.getElementById(relvalue)
181				this.addEvent(asscdropdownmenu, function(){cssdropdown.clearhidemenu()}, "mouseover")
182				this.addEvent(asscdropdownmenu, function(e){cssdropdown.dynamichide(this, e)}, "mouseout")
183				this.addEvent(asscdropdownmenu, function(){cssdropdown.delayhidemenu()}, "click")
184				try{
185					menuitems[i].innerHTML=menuitems[i].innerHTML+" "//+this.dropdownindicator
186				}catch(e){}
187				this.addEvent(menuitems[i], function(e){ //show drop down menu when main menu items are mouse over-ed
188					if (!cssdropdown.isContained(this, e)){
189						var evtobj=window.event || e
190						cssdropdown.dropit(this, evtobj, this.getAttribute("rel"))
191					}
192				}, "mouseover")
193				this.addEvent(menuitems[i], function(e){cssdropdown.dynamichide(this, e)}, "mouseout") //hide drop down menu when main menu items are mouse out
194				this.addEvent(menuitems[i], function(){cssdropdown.delayhidemenu()}, "click") //hide drop down menu when main menu items are clicked on
195			}
196		} //end inner for
197	} //end outer for
198	if (this.enableiframeshim && document.all && !window.XDomainRequest && !this.iframeshimadded){ //enable iframe shim in IE5.5 thru IE7?

199		document.write('<IFRAME id="iframeshim" src="about:blank" frameBorder="0" scrolling="no" style="left:0; top:0; position:absolute; display:none;z-index:90; background: transparent;"></IFRAME>')
200		this.shimobject=document.getElementById("iframeshim") //reference iframe object
201		this.shimobject.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
202		this.iframeshimadded=true
203	}
204} //end startchrome
205
206}