function popimg(url, title, width, height)
{
	str="<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\"><html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1251\">\n<title>"+title+"</title>\n</head>\n<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0>\n<img src='"+url+"' alt='"+title+"'>\n</body>\n</html>";
	f_win = window.open(url ,"BigImage" ,'width='+width+',height='+height+',top='+((screen.height/2)-(height/2))+',left='+((screen.width/2)-(width/2))+',toolbar=no,scrollbars=no,resizable=yes,menubar=no,status=no,directories=no,location=no');
	f_win.document.writeln(str);
	f_win.focus();
	f_win.document.close();
}

function popup(url, title, width, height)
{
	f_win = window.open(url ,"" ,'width='+width+',height='+height+',top='+((screen.height/2)-(height/2))+',left='+((screen.width/2)-(width/2))+',toolbar=no,scrollbars=yes,resizable=yes,menubar=no,status=no,directories=no,location=no');
	f_win.focus();
}

var w3c = (document.getElementById) ?true:false;
var iex = (document.all)            ?true:false;
var ns4 = (document.layers)         ?true:false;
var supported = (w3c || iex || ns4) ?true:false;

var active = false;
var curObj,curNest;

function mousemoved (evt){
	if(iex){
		mousex = window.event.clientX+document.body.scrollLeft;
		mousey = window.event.clientY+document.body.scrollTop;
	}
	else if(ns4){
		mousex = evt.pageX+window.pageXOffset;
		mousey = evt.pageY+window.pageYOffset;
	}
	else{
		mousex = evt.pageX;
		mousey = evt.pageY;
	}
	if(active){
		shiftTo(curObj, mousex+30, mousey-30, curNest);
	}
	return true;
}

// =-=-=-=-=-=-=

function getStyle (objstr, nest){
	nest = (nest) ? "document."+nest+"." : "";
	return (w3c) ? document.getElementById(objstr).style : (iex) ? document.all[objstr].style : (ns4) ? eval(nest+"document."+objstr) : false;
}
function shiftTo (objstr, x, y, nest){
	var obj = getStyle(objstr,nest);
	if(iex){
		obj.pixelLeft = x;
		obj.pixelTop = y-20;
	}
	else if(ns4){
		obj.moveTo(x,y);
	}
	else if(w3c){
		obj.left = x;
		obj.top = y-20;
	}
}
function show (objstr,nest){
	curObj = objstr;
	curNest = (nest) ? nest : null;
	getStyle(objstr,nest).visibility = "visible";
	active = true;
}
function hide (){
	getStyle(curObj,curNest).visibility = "hidden";
	active = false;
}

// =-=-=-=-=-=-=

if(supported){
	if(ns4){
		document.captureEvents(Event.MOUSEMOVE);
	}
	document.onmousemove = mousemoved;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
function est(d){
	document.getElementById(d).style.visibility="visible";
	}
function net(d){
	document.getElementById(d).style.visibility="hidden";
	}
function show (objstr,nest){
	curObj = objstr;
	curNest = (nest) ? nest : null;
	getStyle(objstr,nest).visibility = "visible";
	active = true;
}
function hide (){
	getStyle(curObj,curNest).visibility = "hidden";
	active = false;
}
function comment() {
	$text = document.getElementById('comment');
	if (document.getElementById('comments_all').style.display != 'block') {
		document.getElementById('comments_all').style.display = 'block';
		$text.innerHTML = 'Скрыть '+$text.innerHTML.replace("Коммент", "коммент");
	}
	else {
		document.getElementById('comments_all').style.display = 'none';
		$text.innerHTML = $text.innerHTML.replace('коммент', 'Коммент').replace('Скрыть ', '');
	}
	return false;
}
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

function display_kurs($id) {
	$i = 1;
	while(document.getElementById('tabs-'+$i)) {
		document.getElementById('tabs-'+$i).style.display = 'none';
		$i++;
	}
	document.getElementById($id).style.display = 'block';
	
}
function getElementsByClass(searchClass,node,tag) {
   var classElements = new Array();

   if ( node == null )
      node = document;
   if ( tag == null )
      tag = '*';
   var elements = node.getElementsByTagName(tag);
   var elemLength = elements.length;
   for (var i = 0, j = 0; i < elemLength; i++) {	  
      if (elements[i].className.indexOf('active')!==-1) {
         classElements[j] = elements[i];
         j++;
      }
   }
   return classElements;
}
function menu(event) {
	event = event || window.event   
	var t = event.target || event.srcElement
	if(t.tagName == 'A') {
		var $element = '';
		if (t.parentNode.getElementsByTagName('UL')[0]) {$element = t.parentNode.getElementsByTagName('UL')[0].className;}
		var $active = getElementsByClass('active', t.parentNode.parentNode);
		replace_active($active);
		if ($element.indexOf('active')!==-1) {
			$replace_active= new Array(t, t.parentNode, t.parentNode.getElementsByTagName('UL')[0]);
			replace_active($replace_active);					
		}
		else {
			t.className += " active";
			t.parentNode.className += " active"
			if (t.parentNode.getElementsByTagName('UL')[0]) {t.parentNode.getElementsByTagName('UL')[0].className += " active";}
		}
		if (t.href.length - t.href.indexOf('#') == 1) {
			t.href='javascript:void(0)';
		}
		
	}	
  
}
function replace_active($replace_active) {
	for (var i = 0; i < $replace_active.length; i++) {
		if ($replace_active[i].className.indexOf(' active')!==-1) {
			$replace_active[i].className=$replace_active[i].className.replace(' active', '');
		}
		else {
			$replace_active[i].className=$replace_active[i].className.replace('active', '');
		}
	}
}