//Drop Down/ Overlapping Content: http://www.dynamicdrive.com
//**Updated: Dec 19th, 07': Added ability to dynamically populate a Drop Down content using an external file (Ajax feature)
//**Updated: Feb 29th, 08':
//1) Added ability to reveal drop down content via "click" of anchor link (instead of default "mouseover")
//2) Added ability to disable drop down content from auto hiding when mouse rolls out of it
//3) Added hidediv(id) public function to directly hide drop down div dynamically

//**Updated: Sept 11th, 08': Fixed bug whereby drop down content isn't revealed onClick of anchor in Safari/ Google Chrome

var dropdowncontent={
 disableanchorlink: true, //when user clicks on anchor link, should link itself be disabled (always true if "revealbehavior" above set to "click")
 hidedivmouseout: [true, 200], //Set hiding behavior within Drop Down DIV itself: [hide_div_onmouseover?, miliseconds_before_hiding]
 ajaxloadingmsg: "Loading content. Please wait...", //HTML to show while ajax page is being feched, if applicable
 ajaxbustcache: true, //Bust cache when fetching Ajax pages?

 getposOffset:function(what, offsettype){
  return (what.offsetParent)? what[offsettype]+this.getposOffset(what.offsetParent, offsettype) : what[offsettype]
 },

 isContained:function(m, e){
  var e=window.event || e
  var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
  while (c && c!=m)try {
   c=c.parentNode
   } catch(e){
   c=m
   }
  if (c==m)
   return true
  else
   return false
 },

 show:function(anchorobj, subobj, e){
  if (!this.isContained(anchorobj, e) || (e && e.type=="click")){
   var e=window.event || e
   if (e.type=="click" && subobj.style.visibility=="visible"){
    subobj.style.visibility="hidden"
    return
   }
   //aggiunto
   //anchorobj.style.backgroundColor="#ffaaaa";
   anchorobj.style.borderBottom ="1px solid #ffffff";
   anchorobj.style.borderTop ="1px solid #707070";
   anchorobj.style.borderLeft ="1px solid #707070";
   anchorobj.style.borderRight ="1px solid #707070";
   anchorobj.style.color = "#303030";
   //anchorobj.style.zIndex = 100;
   //anchorobj.style.position = "relative";
      
      
   var horizontaloffset=(subobj.dropposition[0]=="left")? -(subobj.offsetWidth-anchorobj.offsetWidth) : 0 //calculate user added horizontal offset
   var verticaloffset=(subobj.dropposition[1]=="top")? -subobj.offsetHeight : anchorobj.offsetHeight //calculate user added vertical offset
			
   //per explorer 8 aggiunto -1 (altrimenti risultava traslato)
   var ver = getInternetExplorerVersion();
    if (ver > -1) {
        if (ver >= 8.0)
            subobj.style.left=this.getposOffset(anchorobj, "offsetLeft") + horizontaloffset -1+ "px"
        else
            subobj.style.left=this.getposOffset(anchorobj, "offsetLeft") + horizontaloffset + "px"
    }else {

     subobj.style.left=this.getposOffset(anchorobj, "offsetLeft") + horizontaloffset + "px"
    }


   subobj.style.top=this.getposOffset(anchorobj, "offsetTop")+verticaloffset -1 +"px"
   subobj.style.clip=(subobj.dropposition[1]=="top")? "rect(auto auto auto 0)" : "rect(0 auto 0 0)" //hide drop down box initially via clipping
   subobj.style.visibility="visible"
   subobj.startTime=new Date().getTime()
   subobj.contentheight=parseInt(subobj.offsetHeight)
   if (typeof window["hidetimer_"+subobj.id]!="undefined") //clear timer that hides drop down box?
    clearTimeout(window["hidetimer_"+subobj.id])
   this.slideengine(subobj, (subobj.dropposition[1]=="top")? "up" : "down")
  }
 },

 curveincrement:function(percent){
  return (1-Math.cos(percent*Math.PI)) / 2 //return cos curve based value from a percentage input
 },

 slideengine:function(obj, direction){
  var elapsed=new Date().getTime()-obj.startTime //get time animation has run
  if (elapsed<obj.glidetime){ //if time run is less than specified length
   var distancepercent=(direction=="down")? this.curveincrement(elapsed/obj.glidetime) : 1-this.curveincrement(elapsed/obj.glidetime)
   var currentclip=(distancepercent*obj.contentheight)+"px"
   obj.style.clip=(direction=="down")? "rect(0 auto "+currentclip+" 0)" : "rect("+currentclip+" auto auto 0)"
   window["glidetimer_"+obj.id]=setTimeout(function(){
    dropdowncontent.slideengine(obj, direction)
    }, 10)
  }
  else{ //if animation finished
   obj.style.clip="rect(0 auto auto 0)"
  }
 },

 hide:function(activeobj, subobj, e, anchorobj){
  

  if (!dropdowncontent.isContained(activeobj, e)){
   window["hidetimer_"+subobj.id]=setTimeout(function(){
    subobj.style.visibility="hidden"
    subobj.style.left=subobj.style.top=0
        
    //aggiunto
        
    //alert("hi"+anchorobj);
    //aggiunto
    anchorobj.style.borderBottom ="1px solid #cccccc";
    anchorobj.style.borderTop ="1px solid #cccccc";
    anchorobj.style.borderLeft ="1px solid transparent";
    anchorobj.style.borderRight ="1px solid transparent";
    anchorobj.style.color = "#707070";
        
    clearTimeout(window["glidetimer_"+subobj.id])
   }, dropdowncontent.hidedivmouseout[1])
      
  }
 },

 hidediv:function(subobjid){
  document.getElementById(subobjid).style.visibility="hidden";
    
 },

 ajaxconnect:function(pageurl, divId){
  var page_request = false
  var bustcacheparameter=""
  if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc
   page_request = new XMLHttpRequest()
  else if (window.ActiveXObject){ // if IE6 or below
   try {
    page_request = new ActiveXObject("Msxml2.XMLHTTP")
   }
   catch (e){
    try{
     page_request = new ActiveXObject("Microsoft.XMLHTTP")
    }
    catch (e){}
   }
  }
  else
   return false
  document.getElementById(divId).innerHTML=this.ajaxloadingmsg //Display "fetching page message"
  page_request.onreadystatechange=function(){
   dropdowncontent.loadpage(page_request, divId)
   }
  if (this.ajaxbustcache) //if bust caching of external page
   bustcacheparameter=(pageurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
  page_request.open('GET', pageurl+bustcacheparameter, true)
  page_request.send(null)
 },

 loadpage:function(page_request, divId){
  if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
   document.getElementById(divId).innerHTML=page_request.responseText
  }
 },

 init:function(anchorid, pos, glidetime, revealbehavior, url){
  var anchorobj=document.getElementById(anchorid)
  var subobj=document.getElementById(anchorobj.getAttribute("rel"))
  var subobjsource=anchorobj.getAttribute("rev")
  if (subobjsource!=null && subobjsource!="")
   this.ajaxconnect(subobjsource, anchorobj.getAttribute("rel"))
  subobj.dropposition=pos.split("-")
  subobj.glidetime=glidetime || 1000
  subobj.style.left=subobj.style.top=0
  if (typeof revealbehavior=="undefined" || revealbehavior=="mouseover"){
   anchorobj.onmouseover=function(e){
    dropdowncontent.show(this, subobj, e)
    }
   anchorobj.onmouseout=function(e){
    dropdowncontent.hide(subobj, subobj, e, anchorobj)

   }
   if (this.disableanchorlink) anchorobj.onclick=function(){
    //inserito
    document.location=url;
      
    return false
    }
  }
  else
   anchorobj.onclick=function(e){
    //document.location='http://www.google.com';
    dropdowncontent.show(this, subobj, e); return false
      
   }
  if (this.hidedivmouseout[0]==true) //hide drop down DIV when mouse rolls out of it?
   subobj.onmouseout=function(e){
      
    dropdowncontent.hide(this, subobj, e, anchorobj)
     
   }
 }
}

function getInternetExplorerVersion() {
 var rv = -1; // Return value assumes failure.
 if (navigator.appName == 'Microsoft Internet Explorer') {
  var ua = navigator.userAgent;
  var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
  if (re.exec(ua) != null)
   rv = parseFloat(RegExp.$1);
 }
 return rv;
}