function MM_reloadPage(init) {
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_pI() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_pI.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_sI() { //v3.0
  var i,j=0,x,a=MM_sI.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_sIR() {
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
} 

function mester_popup(URL,popW, popH, scroll)
{
 var winleft = (screen.width - popW) / 2;
 var winUp = (screen.height - popH) / 2;
 winProp = 'width='+popW+',height='+popH+',left='+winleft+',top='+winUp+',scrollbars='+scroll+'';
 Win = window.open(URL,'edunet_pop', winProp);
}

function sC(cat_id) 
{
	if(prev_cat_div != '') {
		document.getElementById(prev_cat_div).style.display = 'none';
	}
	document.getElementById('cat-'+cat_id).style.display = 'inline';
	prev_cat_div = 'cat-'+cat_id;
}
var prev_cat_div = 'cat-1';

function menuNAV(cat2_id) 
{
	if(prev_cat2_div!= '') {
		document.getElementById(prev_cat2_div).style.display = 'none';
	}
	document.getElementById('cat2-'+cat2_id).style.display = 'inline';
	prev_cat2_div = 'cat2-'+cat2_id;
}
var prev_cat2_div = 'cat2-1';


function betolt(x) {
	location.href=x.options[x.selectedIndex].value;	
}


function showPopup() {
 var winW = 1100;
 var popup_width = 660;

 if (parseInt(navigator.appVersion)>3) {
  if (navigator.appName=="Netscape") {
	winW = window.innerWidth;
  }
  if (navigator.appName.indexOf("Microsoft")!=-1) {
	winW = document.body.offsetWidth;
  }
 }
 var popup = document.getElementById("popup_layer");
 popup.style.left = Math.round((winW-popup_width)/2)  + "px";
 popup.style.visibility = "visible";
}
function hidePopup() {
 var popup = document.getElementById("popup_layer");
 popup.style.visibility = "hidden";
}


var timeout	= 250;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}