/*
 * @author: Alexander Myadzel <aem@teletype.ru>
 * @modified: n/a
 *
 */
 
function removeClassName(oElement, sClassToRemove)
{
	var sCurrentClass = oElement.className || "";
	//sClassToRemove = sClassToRemove.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)?" + sClassToRemove + "($|\\s)?");
	oElement.className = normalizeSpace(sCurrentClass.replace(oRegExp, "$1$2"));
}

function addClassName(oElement, sClassToAdd)
{
	removeClassName(oElement, sClassToAdd);
	var sCurrentClass = oElement.className || "";
	oElement.className = sCurrentClass + (sCurrentClass ? " " : "") + sClassToAdd;
}

function hasClassName(oElement, sClassToTest)
{
	var sClassName = sClassToTest;
	var oRegExp = new RegExp("(^|\\s)" + sClassName + "($|\\s)");
	return oElement.className.match(oRegExp);
}

function normalizeSpace(s)
{
	s = s.replace(/\s+/, " ");
	s = s.replace(/^\s+/, "");
	s = s.replace(/\s+$/, "");
	return s;
}

function getEventKeyCode(oEvent)
{
    return oEvent.keyCode || oEvent.which || null;    
}

function stopEvent(oEvent)
{
    var oElement = getEventElement(oEvent);

    oEvent.returnValue = false;
    if (oEvent.preventDefault) {
        oEvent.preventDefault();
    }
    
    oEvent.cancelBubble = true;
    if (oEvent.stopPropagation) {
        oEvent.stopPropagation();
    }
}

function addEvent(oElement, sEvent, sCallback, bCapture)
{
    if (oElement.attachEvent) {
        oElement.detachEvent('on' + sEvent, sCallback);
        oElement.attachEvent('on' + sEvent, sCallback);
    } else if (oElement.addEventListener) {
        oElement.addEventListener(sEvent, sCallback, bCapture);
    } else {
        oElement['on' + sEvent] = sCallback;
    }
    return oElement;
}

function removeEvent(oElement, sEvent, sCallback, bCapture)
{
    if (oElement.detachEvent) {
        oElement.detachEvent('on' + sEvent, sCallback);
    } else if (oElement.removeEventListener) {
        oElement.removeEventListener(sEvent, sCallback, bCapture);
    } else {
        oElement['on' + sEvent] = null;
    }
    return oElement;
}

function getEvent(oEvent)
{
    return oEvent || window.event;
}

function getEventElement(oEvent)
{
    var oElement = oEvent.srcElement || oEvent.target;
    
    if (oElement.nodeType == 3) {
        oElement = oEvent.oElement.parentNode;
    }
    
    return oElement;
}

function unescapeHTML(sValue)
{
    var sValue = sValue.toString();
    return sValue.replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&quot;/g, '"').replace(/&#39;/g, '\'').replace(/&amp;/g, '&');
}

function $$(sId)
{
    return document.getElementById(sId);
}

function getElementsByClassName(sClassName, oParentElement)
{
    var oParentElement = oParentElement || document;
    
    if (document.getElementsByClassName) { 
        //https://developer.mozilla.org/en/DOM/document.getElementsByClassName
        return oParentElement.getElementsByClassName(sClassName); 
    } 
    
    var aReturnElements = [];
    var sClassName = sClassName.replace(/\-/g, '\\-');
    var aElements = oParentElement.all ? oParentElement.all : oParentElement.getElementsByTagName('*');

    for (var i = 0; i < aElements.length; i++) {
        if (aElements[i].className.match('(^|\\s)' + sClassName + '(\\s|$)')) {
            aReturnElements.push(aElements[i]);
        }
    }

    return aReturnElements;
}

function getOffset(oElement)
{
    var iTop = 0;
    var iLeft = 0;

    while (oElement.tagName != 'HTML' && oElement.tagName != 'BODY')
    {
        iTop += oElement.offsetTop;
        iLeft += oElement.offsetLeft;
            
        oElement = oElement.offsetParent;
    }
    
    iTop += oElement.offsetTop;
    iLeft += oElement.offsetLeft;
    
    return {
        'top': iTop, 
        'left': iLeft
    }
}

function getNextIndex(iPlanIndex, iLength)
{
    if (iPlanIndex >= iLength) {
        iPlanIndex = 0;
    } else if (iPlanIndex < 0) {
        iPlanIndex = iLength - 1;
    }
    return iPlanIndex;
}

function getParentElement(oElement, sParentNodeName)
{
	var oParent = oElement.parentNode;
	while (oParent.nodeName.toLowerCase() != sParentNodeName.toLowerCase()) {
		oParent = oParent.parentNode;
	}

	return oParent;
}

function getRightCase(iNumber, aWords)
{
	var sNumber = "0" + iNumber.toString();
	
	var iLast = parseInt(sNumber.slice(-1));
	var iTens = parseInt(sNumber.slice(-2).substring(0, 1));

	var sNominative = aWords[0];
	var sGenitiveSingular = aWords[1];
	var sGenitivePlural = aWords[2];

	if (iTens == 1) {
		return sGenitivePlural;
	} else if (iLast == 1) {
		return sNominative;
	} else if (iLast > 0 && iLast < 5) {
		return sGenitiveSingular;
	} else {
		return sGenitivePlural;
	}
}

function getInt(mValue)
{
    var iValue = parseFloat((mValue + '').replace(/[,]+/g, '.').replace(/[^-\d\.]+/g, ''));
    return isNaN(iValue) ? 0 : iValue;
}

function removeClassName(oElement, sClassToRemove)
{
	var sCurrentClass = oElement.className || "";
	sClassToRemove = sClassToRemove.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)?" + sClassToRemove + "($|\\s)?");
	oElement.className = sCurrentClass.replace(oRegExp, "");
}

function addClassName(oElement, sClassToAdd)
{
	removeClassName(oElement, sClassToAdd);
	var sCurrentClass = oElement.className || "";
	oElement.className = sCurrentClass + (sCurrentClass ? " " : "") + sClassToAdd;
}