/* Front end tools used to control front end rendering of widgets and
minor unobtrusive components 
   
Created by DG 01/05/2008
*/
/* Basic DHTML ID CALLER FUNCTIONS */
var blnLoadedFrontEndTools = true;
var onLoadEvents = new Array();

function AddOnLoadEvent(_evt) {
    onLoadEvents.push(_evt);
}

/* Performs a foreach on the array in question */
Array.prototype.foreach = function(predicate) {
    for (var idx = 0; idx < this.length; idx++)
        predicate(this[idx]);
};

Array.prototype.foreach_reverse = function(predicate) {
    for (var idx = (this.length - 1); idx > -1; idx--)
        predicate(this[idx]);
};

window.onload = function() { onLoadEvents.foreach(function(e) { e(); }); };

/* wrapper for document.getElementByID() and document.all and document.GetelementsByTagName*/
function $() {
    var arrObjectsReturned = new Array();
    switch (arguments.length) {
        case 1: { arrObjectsReturned.push(document.getElementById(arguments[0])); }; break;
        case 2: 
            {
                var objs = arguments[0].getElementsByTagName(arguments[1]);
                for (var i = 0; i < objs.length; i++) {
                    arrObjectsReturned.push(objs[i]);
                }
            }; break;
        case 3: 
            {   //look through all elements and search for particular attribute
                //if it matches, add to collection
                //DG 09/05/2008
                var JSON_Parsed = eval("(" + arguments[0] + ")");
                var findElements = document.getElementsByTagName(JSON_Parsed.tag);
                if (findElements.length > 0) {
                    for (var iCtrl = 0; iCtrl < findElements.length; iCtrl++) {
                        var foundVal = findElements[iCtrl].getAttribute(JSON_Parsed.key);
                        if (foundVal != null && foundVal != undefined)
                            if (foundVal.toString().indexOf(JSON_Parsed.value) > -1)//match particular value
                            arrObjectsReturned.push(findElements[iCtrl]); //add to collection
                    }
                }

            }; break;
    }
    return arrObjectsReturned;
}

//safely removes all children from specified container
function DOM_RemoveAllChildren(DOMObject) {
    for (var iObj = (DOMObject.childNodes.length - 1); iObj > -1; iObj--)
        DOMObject.removeChild(DOMObject.childNodes[iObj]);

}

/* AJAX Callbacks to Pages */
var _Obj = new Array();
var _IsHTML = true;
var xmlHttp;
var functionToExec;
var returnData;
var intGlobalObjectIdentifier = 0;
function AJAX_SetTarget(callback_function, URL, GET_POST, params) {
    functionToExec = callback_function;
    xmlHttp = AJAX_CreateRequestObject(AJAX_StateChanged);
    xmlHttp.open(GET_POST, URL, true);
    if (GET_POST == "POST") {
        xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
    }

    xmlHttp.send(params);
}

function AJAX_StateChanged() {
    if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete") {
        try {
            functionToExec(xmlHttp);
        } catch (e) {
            //alert(e.message);
            //throw(e);
        }
    }
}

function AJAX_CreateRequestObject(handler) {
    var ro;
    var browser = navigator.appName;

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

    ro.onreadystatechange = handler;
    return ro;
}

//this is a base widget class


var obj_fade_collection = new Array();
var _faderInt;

function setOpacity(object, level) {
    if (object.style.filter != null)
        object.style.filter = "alpha(style=0, opacity=" + level + ")";
    if (object.filters != null)
        object.filters.alpha.opacity = level;
    if (object.style.MozOpacity != null)
        object.style.MozOpacity = parseInt(level) / 100;
    object.opacity = level;
}

function getOpacity(object) {
    return object.opacity;
}

function fadeout(_obj, _time, _interval) {
    obj_fade_collection.push(_obj);
    setOpacity(_obj, 100);
    setTimeout("startFade(" + _interval + ")", _time);
}

function startFade(_interval) {
    _faderInt = setInterval("fadeoutTrans()", _interval);
}

function fadeoutTrans() {
    var blnContinue = false;
    obj_fade_collection.foreach(function(evt) {
        var itemOpacity = getOpacity(evt);
        if (itemOpacity > 0) {
            blnContinue = true;
            setOpacity(evt, itemOpacity - (itemOpacity > 10) ? 10 : 1);
        }
    });
}
var msgbox;
var msgcontainer;
var _rolloverInt;
//shows a message JS style
function showGDSMessage(_msg) {
    clearInterval(_rolloverInt);

    msgcontainer = $("gds_statusModule")[0];
    DOM_RemoveAllChildren(msgcontainer);

    msgbox = document.createElement("DIV");
    msgbox.id = "msgbox";
    msgbox.appendChild(document.createTextNode(_msg));

    msgcontainer.appendChild(msgbox);
    msgcontainer.style.position = "relative";
    msgcontainer.style.overflow = "hidden";
    msgcontainer.style.height = "30px";

    msgbox.className = "status";
    msgbox.style.position = "relative";
    msgbox.style.top = "-50px";
    msgbox.top = -50;

    //show roll out effect
    _rolloverInt = setInterval("rollEffect('down')", 30);
}

function rollEffect(_dir) {
    if (_dir == "down") {
        if (msgbox.top < 0) {
            msgbox.top = msgbox.top + ((msgbox.top < -15) ? 15 : 1);
            msgbox.style.top = msgbox.top + "px";
        }
        else {
            clearInterval(_rolloverInt);
            setTimeout("rollUp()", 5000);
        }
    }
    else {
        //up
        if (msgbox.top > -50) {
            msgbox.top = msgbox.top - ((msgbox.top > 15) ? 15 : 1);
            msgbox.style.top = msgbox.top + "px";
        }
        else {
            clearInterval(_rolloverInt);
        }
    }
}

function rollUp() {
    _rolloverInt = setInterval("rollEffect('up')", 30);
}

function trimFast(str) {
    var whitespace = ' \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
    for (var i = 0; i < str.length; i++) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(i);
            break;
        }
    }
    for (i = str.length - 1; i >= 0; i--) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(0, i + 1);
            break;
        }
    }
    return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}

function toSentenceCase(sentence) {
    return sentence.toString().toLowerCase().replace(/(^\s*\w|[\.\!\?]\s*\w)/g, function(c) { return c.toUpperCase() });
}


var _intCurrentResolution_Width, _intCurrentResolution_Height;

function getBrowser_ScreenDimensions() {
    _intCurrentBrowserWidth = document.documentElement.clientWidth;
    _intCurrentBrowserHeight = document.documentElement.clientHeight;
    if (navigator.appVersion.indexOf("MSIE") > -1) _blnIsIE = true;

    //Get screen resolution
    _intCurrentResolution_Width = screen.width;
    _intCurrentResolution_Height = screen.height;
}

/////////////////
///This function loads a page in a new window
///Daniel GRant 20/10/2006
/////////////////
function loadNewWindow(obj_srcElement, _width, _height, _blnUseScrollBars) {/*
	if(_currentKey != "ctrl")
		alert("Please hold down on ctrl key while clicking to open in new browser window");
	else
	{
	*/
    getBrowser_ScreenDimensions();
    //Resolution buffer vars
    var _x = 0, _y = 0;

    _y = ((_intCurrentResolution_Height - _height) / 2) - 20;
    _x = (_intCurrentResolution_Width - _width) / 2;

    _currentKey = "";

    var _newWindow;
    try {
        _newWindow = window.open(obj_srcElement.attributes['href'].value, '_blank', "height=" + _height + ",width=" + _width + ",status=yes,toolbar=no,menubar=no,location=0,scrollbars=" + _blnUseScrollBars.toString() + ",top=" + _y + "px, left=" + _x + "px");
    }
    catch (e) {
        _newWindow = window.open(obj_srcElement.href, '_blank', "height=" + _height + ",width=" + _width + ",status=yes,toolbar=no,menubar=no,location=0,scrollbars=" + _blnUseScrollBars.toString() + ",top=" + _y + "px, left=" + _x + "px");
    }

    if (!_newWindow)
        alert("Our system has detected you have popup blocker enabled, please hold down on CTRL while opening link");
    /*}*/
    return false;
}