/* Javascript written by Paula Molinero,   */
/* based on  sevaral code samples and      */
/* other online resources.                 */
/* _______________________________________ */

var thisAction = '';

function createRequestObject() 
{
    var ro;
    if (browser == "Microsoft Internet Explorer") { ro = new ActiveXObject("Microsoft.XMLHTTP"); }
    else { ro = new XMLHttpRequest(); }
    return ro;
}

var http = createRequestObject();

//___ Load full section (s1)
function sndReq (thisAction,backToTop) 
{
    var prevAction = readCookie ('s0');
    var savedAction = readCookie ('s0p');
    
    if((prevAction) && (savedAction) && (prevAction != savedAction)) { createCookie ('s0p',prevAction); }
    createCookie ('s0',thisAction);
    
    http.open ('get', 'index.php?a=1&s0=' + thisAction);
    http.onreadystatechange = handleResponse;
    http.send(null);
    
    if (backToTop) { topOfThePage(); }
}

//___ Run a customized process and load full section (s1)
function sndReq2 (thisAction,vars) 
{
    //alert ('a: ' + thisAction + ' - ' + vars);
    if(thisAction != '')
    {
        http.open ('get', 'index.php?proc=1&flag=' + thisAction + '&v=' + vars);
        http.onreadystatechange = handleGralResponse;
        http.send(null);
    }
}

/*
function sndReq2 (thisAction,gralResponse) 
{
    if(thisAction != '')
    {
        http.open ('get', 'index.php?proc=1&flag=' + thisAction);
        
        if (gralResponse) { http.onreadystatechange = handleGralResponse; }
        else { http.onreadystatechange = handleResponse; }
        http.send(null);
    }
}
*/

//___ Other stuff ______________________________________________________________________________ //
function initPage ()
{
    co = readCookie ('s0');
    if (co) { sndReq (co); } else { sndReq ('home'); }
    
    //window.history.forward(1);
    //location.replace(this.URL);
    //window.history.forward(1);
}

function goBack()
{
    var s0p = readCookie('s0p');
    if (s0p === false) { s0p = 'home'; } 
    sndReq (s0p);
    //alert (s0p)
}

function grabGetVars ()
{
    var idx = document.URL.indexOf('?');
    var params = new Array();
    
    if (idx != -1) 
    {
        var pairs = document.URL.substring(idx+1, document.URL.length).split('&');
        
        for (var i=0; i<pairs.length; i++) 
        {
            nameVal = pairs[i].split('=');
            params[nameVal[0]] = nameVal[1];
        }
    }
    return params;
}

//___ Loading and error messages _______________________________________________________________ //

function loadingError(code) { alert ('Loading error. Select another option. (Code ' + code + ')'); }

function showLoader (Str)
{
    if (!Str) { Str = '<span class="loader-txt">&nbsp;loading...&nbsp;</span>'; }
    printInnerText ('loader',Str);
}


//___ Handling forms ___________________________________________________________________________ //

/* POST */
var ret  = null;
var file = null;
var str  = null;

function subPostForm (f)
{
    var file = 'index.php?proc=1&flag='+f.elements['flag'].value;
    var str = getFormValues(f,'');
    ret = handlePostRequest(file,str);
}
function subDeleteRec (f)
{
    var file = 'index.php?proc=1&flag=delete&DBTableName='+f.elements['flag'].value;
    var str = getFormValues(f,'');
    ret = handlePostRequest(file,str);
}

function handlePostRequest(file,str)
{
    http.open("POST", file, true);
    http.onreadystatechange = handleGralResponse;
    http.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
    http.send(str);
    ret = true;
}

function subPostForm(f)
{
    var file = 'index.php?proc=1&flag='+f.elements['flag'].value;
    var str = getFormValues(f,'');
    ret = handlePostRequest(file,str);
}

//___ Handle form fields -glueing form values __________________________________________________ //
function getFormValues(fobj,valFunc)
{
    var lastElemName = '';
    var valueArr = null;
    var formElem = "";
    var str = "";
    var val = "";
    var cmd = "";

    for(var i = 0;i < fobj.elements.length;i++)
    {
        formElem = fobj.elements[i];
        
        switch(fobj.elements[i].type)
        {
            case "text":
            case "hidden":
            case "password":
            case "textarea":
            
                /*
                if(valFunc)
                {
                    //use single quotes for argument so that the value of
                    //fobj.elements[i].value is treated as a string not a literal
                    cmd = valFunc + "(" + 'fobj.elements[i].value' + ")";
                    val = eval(cmd)
                }
                */
                
                str += formElem.name + "=" + escape(formElem.value) + "&";
                break;

            case "select-one":
                str += formElem.name + "=" + formElem.options[formElem.selectedIndex].value + "&";
                break;
                
            case "select-multiple":
                str_ = '';
                for (var j = 0;j < formElem.length;j++)
                {
                    if (formElem.options[j].selected == true)
                    {
                        if (formElem.options[j].value)
                        {
                            str_ += formElem.options[j].value + ",";
                        }
                    }
                }
                // Strip off last comma
                str_ = str_.substr(0, str_.length - 1);
                str += formElem.name + "=" + str_ + "&";
                break;
                
            case 'radio':
                if (formElem.checked) { str += formElem.name + '=' + escape(formElem.value) + '&'; }
                break;
                
            case 'checkbox':
                if (formElem.checked) 
                {
                    // Continuing multiple, same-name checkboxes
                    if (formElem.name == lastElemName) 
                    {
                        // Strip of end ampersand if there is one
                        if (str.lastIndexOf('&') == str.length-1) 
                        {
                            str = str.substr(0, str.length - 1);
                        }
                        // Append value as comma-delimited string
                        str += ',' + escape(formElem.value);
                    }
                    else 
                    {
                        str += formElem.name + '=' + escape(formElem.value);
                    }
                    
                    str += '&';
                    lastElemName = formElem.name;
                }
                break;
       }
    }
    str = str.substr(0,(str.length - 1));
    return str;
}

//___ Login / logout ___________________________________________________________________________ //
function getLoginFormValues (f)
{
    var str = "";
    str = f.elements['Email'].name + "=" + f.elements['Email'].value + "&" +
          f.elements['Password'].name + "=" + f.elements['Password'].value;
          
    return str
}

function subLoginForm (f)
{
    var str = "";
    str = getLoginFormValues (f);
    //alert (str)
    
    http.open('get', 'index.php?proc=1&flag='+f.elements['flag'].value+'&'+str);
    http.onreadystatechange = handleLoginResponse;
    http.send(null);
}

//___ Handling responses _______________________________________________________________________ //
function handleResponse() 
{
    if(http.readyState == 4)
    {
        showLoader ('&nbsp;');
        
        var response = http.responseText;
        var pageTitle = '-';
        var vars = new Array();
        var s1 = new Array();
        
        if(response.indexOf('|' != -1)) 
        {   
            vars = response.split('|');
                
            s1 = vars[0].split("~");
            pageTitle = vars[1];
            if (pageTitle == '') { pageTitle = '-' }

            if(document.getElementById(s1[0]))
            {
                //document.getElementById(s1[0]).innerHTML = s1[1]
                printInnerText (s1[0],s1[1])
                
                if (pageTitle) { document.title = pageTitle + separator + siteName; }
            }
            else { loadingError('1') }
        }
        else { loadingError('2') }
    }
    else { return showLoader() }
}

function handleNullResponse() 
{
    if(http.readyState == 4) {  } else { return showLoader(); }
}

// More than s1 id
function handleGralResponse () 
{
    if(http.readyState == 4)
    {
        showLoader ('&nbsp;');
        
        var gralResponse = http.responseText;
        var firstChunk = new Array();
        //alert ('r: ' + gralResponse); // debug
        
        // multiple variables
        if(gralResponse.indexOf('|' != -1)) 
        {
            firstChunk = gralResponse.split('|');
            
            for (var i=0;i<firstChunk.length;i++)
            {
                var temp = firstChunk[i].split('~');
                
                // check if it's a redirect
                if (temp[0] == 'redirect') { document.location.href = temp[1]; }
                
                // search for page title
                else if (temp[0] == 'pageTitle') { var pageTitle = temp[1]; }
                
                else if(document.getElementById(temp[0])) { printInnerText (temp[0],temp[1]); }
            }
            
            // set page title
            if (pageTitle) { document.title = pageTitle + separator + siteName; }
        }
        // only one variable 
        else if (gralResponse.indexOf('~' != -1)) 
        {
            var firstChunk = gralResponse.split('~');
            
            // check if it's a redirect
            if (firstChunk[0] == 'redirect') { document.location.href = firstChunk[1]; }
            else
            {
                if(document.getElementById(firstChunk[0])) { printInnerText (firstChunk[0], firstChunk[1]); }
            }
        }
        else { sError() }
    }
    else { return showLoader() }
}