function detect_browser()
{
var browser;

// FireFox
if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1)
{
var start_pos = (navigator.userAgent.toLowerCase().indexOf("firefox")+8);
var end_pos = start_pos+1;
browser = "firefox" + navigator.userAgent.substring(start_pos, end_pos);
}

// Opera
else if (navigator.userAgent.toLowerCase().indexOf("opera") > -1)
{
var start_pos = (navigator.userAgent.toLowerCase().indexOf("opera")+6);
var end_pos = start_pos+4;
browser = "opera";
}

return browser;
}


function Toggle(item) {
   obj=document.getElementById(item);
   visible=(obj.style.display!="none")
   key=document.getElementById("x" + item);
   if (visible) {
     obj.style.display="none";
     key.innerHTML="<img src='/images/style/submenu/menu-closed.gif' width='9' height='9' hspace='0' vspace='0' border='0'>";
   } else {
      obj.style.display="block";
      key.innerHTML="<img src='/images/style/submenu/menu-open.gif' width='9' height='9' hspace='0' vspace='0' border='0'>";
   }
}

function Toggle_menu_item(item) { //nové menu
   var parent=item.parentNode;
   switch(parent.className){
	   case "opened": parent.className = "closed";
	                  item  .className = "item-name closed";
	   				  break;
	   case "closed": parent.className = "opened";
	                  item  .className = "item-name opened";
	   				  break;
	   }
}

function detect_browser2()
{
var browser;

// FireFox
if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1)
{
var start_pos = (navigator.userAgent.toLowerCase().indexOf("firefox")+8);
var end_pos = start_pos+1;
browser = "table-cell";
}

// Opera
else if (navigator.userAgent.toLowerCase().indexOf("opera") > -1)
{
var start_pos = (navigator.userAgent.toLowerCase().indexOf("opera")+6);
var end_pos = start_pos+4;
browser = "table-cell";
}

// Microsoft IE
if (navigator.userAgent.toLowerCase().indexOf("msie") > -1)
{
var start_pos = (navigator.userAgent.toLowerCase().indexOf("msie")+5);
var end_pos = start_pos+3;
browser = "block";
} 

return browser;
}

function Toggle_class(item) {
   obj=getElementsByClass(item,null,null);
   for (i = 0; i < obj.length; i++)
   {
	   visible=(obj[i].style.display!="none")
	   if (visible) {
		 obj[i].style.display="none";
	   } else {
		  obj[i].style.display=detect_browser2();
	   }
   }
}

function Toggle_class2(item) {
   obj=getElementsByClass(item,null,null);
   for (i = 0; i < obj.length; i++)
   {
		 obj[i].style.display="none";
   }
}


function getElementsByClass(searchClass,node,tag) {

        var classElements = new Array();
        if (node == null)
                node = document;
        if (tag == null)
                tag = '*';
        var els = node.getElementsByTagName(tag);
        var elsLen = els.length;
        var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
        var j = 0;
        for (i = 0; i < elsLen; i++) {
                if (pattern.test(els[i].className) ) {
                        classElements[j] = els[i];
                        j++;
                }
        }
        return classElements;
}

function Add_active_by_id(item) {
   obj=document.getElementById(item);
   obj.className="active";
}

function Clear_classNames(langs) {
	var elsLen = langs.length;
	for (i = 0; i < elsLen; i++) {
		 obj=document.getElementById('s'+i);
   		 obj.className="deactive";
	}

}