//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: November 14th 06- added iframe shim technique

var cssdropdown={
disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
disablemenuclick: true, //when user clicks on a menu item with a drop down menu, disable menu item's link?
enableswipe: 0, //enable swipe effect? 1 for yes, 0 for no
enableiframeshim: 1, //enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 1 for yes, 0 for no

//No need to edit beyond here////////////////////////
dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,

getposOffset:function(what, offsettype)	{
	var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
	var parentEl=what.offsetParent;
	
	while (parentEl!=null && parentEl.id!='wrapper') {
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
    //alert('offsettype = '+offsettype+' en totaloffset = '+totaloffset);
	return totaloffset;
},

swipeeffect:function(){
	if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight)){
		this.bottomclip+=10+(this.bottomclip/10) //unclip drop down menu visibility gradually
		this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
	} else {
	   return this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
	}
},

showhide:function(obj, e) {
    if (this.ie || this.firefox)
        this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
        if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover") {
            if (this.enableswipe==1){
                if (typeof this.swipetimer!="undefined")
                    clearTimeout(this.swipetimer)
                    obj.clip="rect(0 auto 0 0)" //hide menu via clipping
                    this.bottomclip=0
                    this.swipeeffect()
                }
                obj.visibility="visible"
            }
            else if (e.type=="click")
obj.visibility="hidden"
},

iecompattest:function(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
},

clearbrowseredge:function(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=this.ie && !window.opera? this.iecompattest().scrollLeft+this.iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
}
else{
var topedge=this.ie && !window.opera? this.iecompattest().scrollTop : window.pageYOffset
var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up?
edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
}
}
return edgeoffset
},

dropit:function(obj, e, dropmenuID){
if (this.dropmenuobj!=null) //hide previous menu
this.dropmenuobj.style.visibility="hidden" //hide menu
this.clearhidemenu()
if (this.ie||this.firefox){
obj.onmouseout=function(){cssdropdown.delayhidemenu()}
//obj.onclick=function(){return !cssdropdown.disablemenuclick} //disable main menu item link onclick?
this.dropmenuobj=document.getElementById(dropmenuID)
this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
this.dropmenuobj.onmouseout=function(e){cssdropdown.dynamichide(e)}
this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
this.showhide(this.dropmenuobj.style, e)
this.dropmenuobj.x=this.getposOffset(obj, "left")
this.dropmenuobj.y=this.getposOffset(obj, "top")
this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
this.positionshim() //call iframe shim function
}
},

positionshim:function() { //display iframe shim function
    if (this.enableiframeshim && typeof this.shimobject!="undefined"){
        if (this.dropmenuobj.style.visibility=="visible"){
            this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
            this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
            this.shimobject.style.left=this.dropmenuobj.style.left
            this.shimobject.style.top=this.dropmenuobj.style.top
        }
        this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
    }
},

hideshim:function() {
    if (this.enableiframeshim && typeof this.shimobject!="undefined")
        this.shimobject.style.display='none'
},

contains_firefox:function(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
},

dynamichide:function(e){
	var evtobj=window.event? window.event : e
	if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement)) {
		this.delayhidemenu()
		} else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget)) {
		this.delayhidemenu()
	}
},

delayhidemenu:function(){
	this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim()",this.disappeardelay) //hide menu
},

clearhidemenu:function(){
	if (this.delayhide!="undefined"){
		clearTimeout(this.delayhide)
	}
},

startchrome:function(){
for (var ids=0; ids<arguments.length; ids++){
	var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
	for (var i=0; i<menuitems.length; i++){
		if (menuitems[i].getAttribute("rel")){
			var relvalue=menuitems[i].getAttribute("rel")
			menuitems[i].onmouseover=function(e){
			var event=typeof e!="undefined"? e : window.event
			cssdropdown.dropit(this,event,this.getAttribute("rel"))
		}
	}
}
}
if (window.createPopup && !window.XmlHttpRequest){ //if IE5.5 to IE6, create iframe for iframe shim technique
	document.write('<IFRAME id="iframeshim"  src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>')
	this.shimobject=document.getElementById("iframeshim") //reference iframe object
	}
}

}