// -- general scripts --
function getEl(id) {
	return document.getElementById(id);
}

function addCSSClass(cssClass, obj) {
	if ((obj == null) || (typeof(obj)=='undefined'))
	return false;

	if ((' '+obj.className+' ').indexOf(' '+cssClass+' ') == -1)
		obj.className += ' '+cssClass;
}

function removeCSSClass(cssClass, obj) {
	if ((obj == null) || (typeof(obj)=='undefined'))
	return false;

	if ((' ' + obj.className + ' ').indexOf(' ' + cssClass + ' ') != -1)
		obj.className = (' '+obj.className+' ').replace(new RegExp(' '+cssClass+' ',"g"),'');
}

function setCSSClass(cssClass, obj) {
	if ((obj == null) || (typeof(obj)=='undefined'))
	return false;

	obj.className = cssClass;
}

function hasCSSClass(cssClass, obj) {
	if ((obj == null) || (typeof(obj)=='undefined'))
	return false;

	return ((' ' + obj.className + ' ').indexOf(' ' + cssClass + ' ') >= 0);
}

function removeClassInContainer(cssClass, tagName, containerObj) {
	var tagList = containerObj.getElementsByTagName(tagName);
	for (var i=0; i<tagList.length; i++)
		if (tagList[i].className.indexOf(cssClass)!=-1)
			removeCSSClass(cssClass,tagList[i]);
}

function checkBrowser(browser) {
	return (navigator.userAgent.indexOf(browser)!=-1);
}

function setBackgroundImage(obj, url) {
	if ((obj == null) || (typeof(obj)=='undefined'))
	return false;

	obj.style.backgroundImage = 'url('+url+')';
}

function getBackgroundPositionX(obj) {
	if (checkBrowser('MSIE')) return getStyle(getEl(POPUP_HTML_ID), 'background-position-x');
	else return getStyle(getEl(POPUP_HTML_ID), 'background-position').split(' ')[0];
}

function getBackgroundPositionY(obj) {
	if (checkBrowser('MSIE')) return getStyle(getEl(POPUP_HTML_ID), 'background-position-y');
	else return getStyle(getEl(POPUP_HTML_ID), 'background-position').split(' ')[1];
}

function getStyle(oElm, strCssRule){ /* TODO: review; rewrite */
	var strValue = "";
	if(document.defaultView && document.defaultView.getComputedStyle){
		strValue = document.defaultView.getComputedStyle(oElm, "").getPropertyValue(strCssRule);
	}
	else if(oElm.currentStyle){
		strCssRule = strCssRule.replace(/\-(\w)/g, function (strMatch, p1){
			return p1.toUpperCase();
		});
		strValue = oElm.currentStyle[strCssRule];
	}
	return strValue;
}

function getXPos(obj) {
  leftGes = obj.offsetLeft;
  while (obj.offsetParent && hasPosition(obj)) {
    obj = obj.offsetParent;
    leftGes = leftGes + obj.offsetLeft;
  }
  return parseInt(leftGes);
}

function getYPos(obj) {
  topGes = obj.offsetTop;
  while (obj.offsetParent && hasPosition(obj)) {
    obj = obj.offsetParent;
    topGes = topGes + obj.offsetTop;
  }
  return parseInt(topGes);
}

function hasPosition(obj) {
	return ((getStyle(obj.offsetParent, 'position') != 'relative') && (getStyle(obj.offsetParent, 'position') != 'absolute')) ? true : false;
}
// -- // general scripts --