/**
* Librerias Javascript - AJAX para crear una caja con pestañas
* Autor: Jorge Casas [jorgecasas@iternova.net]
* Version: 1.0.0
* Modificado: 20090703
**/
var refreshIdVM = 0;
var ddajaxtabssettings={}
ddajaxtabssettings.bustcachevar=1
ddajaxtabssettings.loadstatustext="<img src='images/ajaxloading.gif' /> Cargando contenidos..." 
function ddajaxtabs(tabinterfaceid, contentdivid){
    this.tabinterfaceid=tabinterfaceid
    this.tabs=document.getElementById(tabinterfaceid).getElementsByTagName("a")
    this.enabletabpersistence=true
    this.hottabspositions=[]
    this.currentTabIndex=0
    this.contentdivid=contentdivid
    this.defaultHTML=""
    this.defaultIframe='<iframe src="about:blank" marginwidth="0" marginheight="0" frameborder="0" vspace="0" hspace="0" class="tabcontentiframe" style="width:100%; height:auto; min-height: 100px"></iframe>'
    this.defaultIframe=this.defaultIframe.replace(/<iframe/i, '<iframe name="'+"_ddajaxtabsiframe-"+contentdivid+'" ')
    this.revcontentids=[]
    this.selectedClassTarget="link"
}
ddajaxtabs.connect=function(pageurl, tabinstance){
    var page_request = false
    var bustcacheparameter=""
    if (window.XMLHttpRequest)
        page_request = new XMLHttpRequest()
    else if (window.ActiveXObject){
        try {
        page_request = new ActiveXObject("Msxml2.XMLHTTP")
        } 
        catch (e){
            try{
            page_request = new ActiveXObject("Microsoft.XMLHTTP")
            }
            catch (e){}
        }
    }
    else
        return false
    var ajaxfriendlyurl=pageurl.replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/") 
    page_request.onreadystatechange=function(){ddajaxtabs.loadpage(page_request, pageurl, tabinstance)}
    if (ddajaxtabssettings.bustcachevar) //if bust caching of external page
        bustcacheparameter=(ajaxfriendlyurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
    page_request.open('GET', ajaxfriendlyurl+bustcacheparameter, true)
    page_request.send(null)
}
ddajaxtabs.loadpage=function(page_request, pageurl, tabinstance){
    var divId=tabinstance.contentdivid
    document.getElementById(divId).innerHTML=ddajaxtabssettings.loadstatustext
    if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
        document.getElementById(divId).innerHTML=page_request.responseText
        ddajaxtabs.ajaxpageloadaction(pageurl, tabinstance)
    }
}
ddajaxtabs.ajaxpageloadaction=function(pageurl, tabinstance){
    tabinstance.onajaxpageload(pageurl)
}
ddajaxtabs.getCookie=function(Name){ 
    var re=new RegExp(Name+"=[^;]+", "i");
    if (document.cookie.match(re))
        return document.cookie.match(re)[0].split("=")[1]
    return ""
}
ddajaxtabs.setCookie=function(name, value){
    document.cookie = name+"="+value+";path=/" 
}
ddajaxtabs.prototype={
    expandit:function(tabid_or_position){
        this.cancelautorun()
        var tabref=""
        try{
            if (typeof tabid_or_position=="string" && document.getElementById(tabid_or_position).getAttribute("rel"))
                tabref=document.getElementById(tabid_or_position)
            else if (parseInt(tabid_or_position)!=NaN && this.tabs[tabid_or_position].getAttribute("rel"))
                tabref=this.tabs[tabid_or_position]
        }
        catch(err){alert("Número de pestaña incorrecta")}
        if (tabref!="")
            this.expandtab(tabref)
    },
    cycleit:function(dir, autorun){
        if (dir=="next"){
            var currentTabIndex=(this.currentTabIndex<this.hottabspositions.length-1)? this.currentTabIndex+1 : 0
        }
        else if (dir=="prev"){
            var currentTabIndex=(this.currentTabIndex>0)? this.currentTabIndex-1 : this.hottabspositions.length-1
        }
        if (typeof autorun=="undefined")
            this.cancelautorun()
        this.expandtab(this.tabs[this.hottabspositions[currentTabIndex]])
    },
    setpersist:function(bool){
            this.enabletabpersistence=bool
    },
    loadajaxpage:function(pageurl){
        ddajaxtabs.connect(pageurl, this)
    },
    loadiframepage:function(pageurl){
        this.iframedisplay(pageurl, this.contentdivid)
    },
    setselectedClassTarget:function(objstr){
        this.selectedClassTarget=objstr || "link"
    },
    getselectedClassTarget:function(tabref){
        return (this.selectedClassTarget==("linkparent".toLowerCase()))? tabref.parentNode : tabref
    },
    onajaxpageload:function(pageurl){
    },
    expandtab:function(tabref){
        var relattrvalue=tabref.getAttribute("rel")
        var associatedrevids=(tabref.getAttribute("rev"))? ","+tabref.getAttribute("rev").replace(/\s+/, "")+"," : ""
        if (relattrvalue=="#default")
            document.getElementById(this.contentdivid).innerHTML=this.defaultHTML
        else if (relattrvalue.indexOf("#iframe")!=-1){
            if (!isNaN(parseInt(relattrvalue.split(':')[1])))
                this.defaultIframe=this.defaultIframe.replace(/height:[^;]+;/i, 'height:'+parseInt(relattrvalue.split(':')[1])+'px;')
            this.iframedisplay(tabref.getAttribute("href"), this.contentdivid)
        }
        else
            ddajaxtabs.connect(tabref.getAttribute("href"), this)
        this.expandrevcontent(associatedrevids)
        for (var i=0; i<this.tabs.length; i++){
            this.getselectedClassTarget(this.tabs[i]).className=(this.tabs[i].getAttribute("href")==tabref.getAttribute("href"))? "selected" : ""
        }
        if (this.enabletabpersistence)
            ddajaxtabs.setCookie(this.tabinterfaceid, tabref.tabposition)
        this.setcurrenttabindex(tabref.tabposition)
    },
    iframedisplay:function(pageurl, contentdivid){
        if (typeof window.frames["_ddajaxtabsiframe-"+contentdivid]!="undefined"){
            try{delete window.frames["_ddajaxtabsiframe-"+contentdivid]}
            catch(err){}
        }
        document.getElementById(contentdivid).innerHTML=this.defaultIframe
        window.frames["_ddajaxtabsiframe-"+contentdivid].location.replace(pageurl)
    },
    expandrevcontent:function(associatedrevids){
        var allrevids=this.revcontentids
        for (var i=0; i<allrevids.length; i++){
            document.getElementById(allrevids[i]).style.display=(associatedrevids.indexOf(","+allrevids[i]+",")!=-1)? "block" : "none"
        }
    },
    setcurrenttabindex:function(tabposition){
        for (var i=0; i<this.hottabspositions.length; i++){
            if (tabposition==this.hottabspositions[i]){
                this.currentTabIndex=i
                break
            }
        }
    },
    autorun:function(){
        this.cycleit('next', true)
    },
    cancelautorun:function(){
        if (typeof this.autoruntimer!="undefined")
            clearInterval(this.autoruntimer)
    },
    init:function(automodeperiod){
        var persistedtab=ddajaxtabs.getCookie(this.tabinterfaceid)
        var persisterror=true
        this.automodeperiod=automodeperiod || 0
        this.defaultHTML=document.getElementById(this.contentdivid).innerHTML
        for (var i=0; i<this.tabs.length; i++){
            this.tabs[i].tabposition=i 
            if (this.tabs[i].getAttribute("rel")){
                var tabinstance=this
                this.hottabspositions[this.hottabspositions.length]=i
                this.tabs[i].onclick=function(){
                    tabinstance.expandtab(this)
                    tabinstance.cancelautorun()
                    return false
                }
                if (this.tabs[i].getAttribute("rev")){
                    this.revcontentids=this.revcontentids.concat(this.tabs[i].getAttribute("rev").split(/\s*,\s*/))
                }
                if (this.enabletabpersistence && parseInt(persistedtab)==i || !this.enabletabpersistence && this.getselectedClassTarget(this.tabs[i]).className=="selected"){
                    this.expandtab(this.tabs[i])
                    persisterror=false
                }
            }
        }
        if (persisterror)
            this.expandtab(this.tabs[this.hottabspositions[0]])
        if (parseInt(this.automodeperiod)>500 && this.hottabspositions.length>1){
            this.autoruntimer=setInterval(function(){tabinstance.autorun()}, this.automodeperiod)
        }
    }
}