function getElementsByClassName(strClass, strTag, objContElm) {
  strTag = strTag || "*";
  objContElm = objContElm || document;
  var objColl = objContElm.getElementsByTagName(strTag);
  if (!objColl.length &&  strTag == "*" &&  objContElm.all) objColl = objContElm.all;
  var arr = new Array();
  var delim = strClass.indexOf('|') != -1  ? '|' : ' ';
  var arrClass = strClass.split(delim);
  for (var i = 0, j = objColl.length; i < j; i++) {
    var arrObjClass = objColl[i].className.split(' ');
    if (delim == ' ' && arrClass.length > arrObjClass.length) continue;
    var c = 0;
    comparisonLoop:
    for (var k = 0, l = arrObjClass.length; k < l; k++) {
      for (var m = 0, n = arrClass.length; m < n; m++) {
        if (arrClass[m] == arrObjClass[k]) c++;
        if (( delim == '|' && c == 1) || (delim == ' ' && c == arrClass.length)) {
          arr.push(objColl[i]);
          break comparisonLoop;
        }
      }
    }
  }
  return arr;
}/* required scripts:
---------------------------------
   - getElementsByClassName.js
	 - addLoadEvent.js
*/
/*
addLoadEvent(function () {
	var ary_hlElems = getElementsByClassName('rous_navi');
	for(n=0; n < ary_hlElems.length; n++){
		ary_hlElems[n].addEventListener('click', function () { rousAktivate(this) }, false);
	}

	var ary_hlElems = getElementsByClassName('rous_prev');
	for(n=0; n < ary_hlElems.length; n++){
		ary_hlElems[n].addEventListener('click', function () { rousAktivate('prev') }, false);
	}

	var ary_hlElems = getElementsByClassName('rous_next');
	for(n=0; n < ary_hlElems.length; n++){
		ary_hlElems[n].addEventListener('click', function () { rousAktivate('next') }, false);
	}
});
*/

function rousRefresh(id, ary_rsElems) {
	if(id == ary_rsElems.length){
		id = 0;
	}else if(id == -1){
		id = ary_rsElems.length-1;
	}else if(id == undefined){
		id = 0;
	}

	for(n=0; n < ary_rsElems.length; n++){
		if(n==id){
			/*ary_rsElems[n].style.display = "block";*/
			ary_rsElems[n].className=ary_rsElems[n].className.replace(/highlight/, "");
			if(ary_rsElems[n].className==""){
				ary_rsElems[n].className = ary_rsElems[n].className+"highlight";
			}else{
				ary_rsElems[n].className = ary_rsElems[n].className+" highlight";
			}
		}else{
			/*ary_rsElems[n].style.display = "none";*/
			ary_rsElems[n].className=ary_rsElems[n].className.replace(/highlight/, "");
		}
	}
}

function switchHighlight(id, ary_hlElems) {

	if(id == ary_hlElems.length){
		id = 0;
	}else if(id == -1){
		id = ary_hlElems.length-1;
	}else if(id == undefined){
		id = 0;
	}

	for(n=0; n < ary_hlElems.length; n++){
		if(n==id){
			ary_hlElems[n].className=ary_hlElems[n].className.replace(/highlight/, "");
			ary_hlElems[n].className=ary_hlElems[n].className.replace(/iam/, "");
			if(ary_hlElems[n].className==""){
				ary_hlElems[n].className = ary_hlElems[n].className+"highlight";
			}else{
				ary_hlElems[n].className = ary_hlElems[n].className+" highlight";
			}
		}else{
			ary_hlElems[n].className=ary_hlElems[n].className.replace(/highlight/, "");
		}
	}
}

function getAktivated(thisElem, ary_hlElems) {
	if(thisElem == 'next'){
		for(n=0; n < ary_hlElems.length; n++){
			if(ary_hlElems[n].className.indexOf("highlight") > 0) {
				n++;
				return n;
			}
		}
	}else	if(thisElem == 'prev'){
		for(n=0; n < ary_hlElems.length; n++){
			if(ary_hlElems[n].className.indexOf("highlight") > 0) {
				n++;
				return n;
			}
		}
	}else{
		if(thisElem.className==""){
			thisElem.className = "iam";
		}else{
			thisElem.className = thisElem.className+" iam";
		}

		for(n=0; n < ary_hlElems.length; n++){
			if(ary_hlElems[n].className.indexOf("iam") > 0) {
				return n;
			}
		}
	}
}

function rousAktivate(thisElem) {
	var ary_hlElems = getElementsByClassName('rous_navi');
	var ary_rsElems = getElementsByClassName('rous');

	if(thisElem == 'next') {
		var id = getAktivated(thisElem, ary_hlElems);
		switchHighlight(id);
		rousRefresh(id, ary_rsElems);
	}else if(thisElem == 'prev') {
		var id = getAktivated(thisElem, ary_hlElems);
		id=id-2;
		switchHighlight(id);
		rousRefresh(id, ary_rsElems);
	}else{
		var id = getAktivated(thisElem, ary_hlElems);
		switchHighlight(id, ary_hlElems);
		rousRefresh(id, ary_rsElems);
	}
}

function rous_naviAktivate(thisElem) {
	var ary_hlElems = getElementsByClassName('rous_navi');
	var ary_rsElems = getElementsByClassName('rous');

	if(thisElem == 'next') {
		var id = getAktivated(thisElem, ary_hlElems);
		switchHighlight(id);
		rousRefresh(id, ary_rsElems);
	}else if(thisElem == 'prev') {
		var id = getAktivated(thisElem, ary_hlElems);
		id=id-2;
		switchHighlight(id);
		rousRefresh(id, ary_rsElems);
	}else{
		var id = getAktivated(thisElem, ary_rsElems);
		switchHighlight(id, ary_rsElems);
		rousRefresh(id, ary_hlElems);
	}
}