function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i< arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function closex(x) {
if (x == '') x = 'a';
    for (var i = 0; i < 24; i++) {
        document.getElementById('x'+x+i).style.display = "none";
    }
}

function xd(x) {
if (x == '' || x == 'close') x = 'none';
if (x == 'open') x = premenna;

    for (var i = 0; i < 6; i++) {
            document.getElementById('xd'+i).style.display = x;
    }
}

function trSwitch(x) {
var ara = getElementsByClassName(document, "tr", "tra");
var arb = getElementsByClassName(document, "tr", "trb");

    for (i = 0; i < ara.length; i++) {
        if (i == x)
           if (arb[i].style.display == "none") {
               ara[i].style.display = "none";
               arb[i].style.display = premenna;
           }
           else {
               ara[i].style.display = premenna;
               arb[i].style.display = "none";
           }
        else {
           ara[i].style.display = "none";
           arb[i].style.display = premenna;
        }
    }
}

function tableSwitch(x) {
var art = getElementsByClassName(document, "tr", "trt");

    for (i = 0; i < art.length; i++) {
        if (i == (x*2)) {
           art[i].style.display = premenna;
           art[i+1].style.display = premenna;
        }
        else {
           art[i].style.display = "none";
           art[i+1].style.display = "none";
        }
        i++;
    }
}

function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i = 0; i < anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") anchor.target = "_blank";
	}
}