var isIE = false;

// global request and XML document objects
var req, select;

var date = new Date();

// retrieve XML document (reusable generic function);
// parameter is URL string (relative or complete) to
// an .xml file whose Content-Type is a valid XML
// type, such as text/xml; XML source must be from
// same domain as HTML file
function loadXMLDoc(url) {
    // branch for native XMLHttpRequest object
    url += '&timestamp=' + date.getMilliseconds();
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        isIE = true;
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }    
}

// handle onreadystatechange event of req object
function processReqChange() {
    // only if req shows "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            clearTopicList();
            buildTopicList();
         } else {
           // alert("There was a problem retrieving the XML data:\n" +
            //    req.statusText);
            clearTopicList();
         }
    }
}

// invoked by "Category" select element change;
// loads chosen XML document, clears Topics select
// element, loads new items into Topics select element
function loadDoc(evt,obj) {
    // equalize W3C/IE event models to get event object
    evt = (evt) ? evt : ((window.event) ? window.event : null);
    if (evt) {
        // equalize W3C/IE models to get event target reference
        var elem = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
        select = getObj(obj);
        if (elem) {
            try {
                if (elem.selectedIndex > 0) {
                    loadXMLDoc("GenerateJsList.aspx?parent="+elem.options[elem.selectedIndex].value);
                }	
            }
            catch(e) {
                var msg = (typeof e == "string") ? e : ((e.message) ? e.message : "Unknown Error");
               // alert("Unable to get XML data:\n" + msg);
                clearTopicList();
                return;
            }
        }
    }
}

// retrieve text of an XML document element, including
// elements using namespaces
function getElementTextNS(prefix, local, parentElem, index) {
    var result = "";
    if (prefix && isIE) {
        // IE/Windows way of handling namespaces
        result = parentElem.getElementsByTagName(prefix + ":" + local)[index];
    } else {
        // the namespace versions of this method 
        // (getElementsByTagNameNS()) operate
        // differently in Safari and Mozilla, but both
        // return value with just local name, provided 
        // there aren't conflicts with non-namespace element
        // names
        result = parentElem.getElementsByTagName(local)[index];
    }
    if (result) {
        // get text, accounting for possible
        // whitespace (carriage return) text nodes 
        if (result.childNodes.length > 1) {
            return result.childNodes[1].nodeValue;
        } else {
            return result.firstChild.nodeValue;    		
        }
    } else {
        return "n/a";
    }
}

// empty Topics select list content
function clearTopicList() {
    
    while (select.length > 1) {
        select.remove(1);
    }
}

// add item to select element the less
// elegant, but compatible way.
function appendToSelect(select, value, content) {
    var opt;
    opt = document.createElement("option");
    opt.value = value;
    opt.appendChild(content);
    select.appendChild(opt);
}

// fill Topics select list with items from
// the current XML document
function buildTopicList() {
    var items = req.responseXML.getElementsByTagName("Table");
    // loop through <item> elements, and add each nested
    // <title> element to Topics select element
    for (var i = 0; i < items.length; i++) {
        
        appendToSelect(select, document.createTextNode(getElementTextNS("", "destinasjonID", items[i], 0)),
            document.createTextNode(getElementTextNS("", "destinasjon", items[i], 0)));
    }
    // clear detail display
    //document.getElementById("details").innerHTML = "";
}

function getObj(obj)
{
    return document.getElementById(obj);
}

function sendXMLDoc(url) {
    // branch for native XMLHttpRequest object
    url += '&timestamp=' + date.getMilliseconds();
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        isIE = true;
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.open("GET", url, true);
            req.send();
        }
    }
}

function showhide(obj)
{
    var wObj = getObj(obj);
    if(wObj.style.display == 'none')
    {
        wObj.style.display = 'block';
        return;
    }
    wObj.style.display = 'none';
}

function check_form_omoss()
{   
    var valid = true;
    var errmsg = '';

    if(getObj('hname').value.length < 2)
    {
        valid = false;
        errmsg += 'DU måste fylla i hotellets namn.\n';
    }
    
    if(getObj('adr').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i hotellets gatuadress.\n';
    }
    
    if(getObj('pnr').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i hotellets postnummer.\n';
    }
    
    if(getObj('psted').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i postadress.\n';
    }
    
    if(getObj('tlf').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i telefon.\n';
    }
    
    if(getObj('pers').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i kontaktperson.\n';        
    }
    
    if(getObj('epost').value.length < 5)
    {
        valid = false;
        errmsg += 'Du måste fylla i kontaktemail.\n';
    }
    
    if(!valid)
    {
        alert(errmsg);
        return false;
    }
}

function check_pass()
{
    if(getObj('ctl00_ContentPlaceHolder1_txtUname').value == '')
    {
        alert('Fyll i ditt brukernamn!');
    }
}

function check_contact()
{
    var errmsg = '';
    var valid = true;

    if(getObj('ctl00_ContentPlaceHolder1_txtFirstName').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i förnamn.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtLastName').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i efternamn.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtAdr1').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i gatuadress.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtPostNr').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i postnummer.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtSted').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i stad.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtLand').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i land.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtTlf').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i telefon.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtMob').value.length < 2)
    {
        valid = false;
        errmsg += 'Du måste fylla i mobilnr.\n';        
    }
    
    if(getObj('ctl00_ContentPlaceHolder1_txtEmail').value.indexOf('@') == -1)
    {
        valid = false;
        errmsg += 'Du måste fylla i et korrekt email.\n';        
    }
    else
    {
        if(getObj('ctl00_ContentPlaceHolder1_txtEmail').value.split('@')[1].indexOf('.') == -1)
        {
            valid = false;
            errmsg += 'Du måste fylla i et korekt email.\n';
        }
    }
    
    if(!valid)
    {
       alert(errmsg);
       return false;
    }   
}