NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
DOM = (document.getElementById) ? 1 : 0;


var RetegAtad;
var OutImg;
var OnImg;

function Reteg(retegnev) {
    AktLayer = "";
    if (NS4) {
	AktLayer = document.layers[retegnev];
    } else if (IE4) {
	AktLayer = document.all[retegnev].style;
    } else if (DOM) {
	AktLayer = document.getElementById(retegnev).style;
    }
    return AktLayer;
}

function ImgCsere(OnReteg,KepNev) {
    RetegAtad = OnReteg;
    OutImg = KepNev;
    if (NS4 && OnReteg!="") {
        OutImgSrc = document.layers[OnReteg].document.images[KepNev].src;
    } else {
        OutImgSrc = document.images[KepNev].src;
    }
    var OnImgSrc = OutImgSrc;
    if (OnImgSrc.search('_on.gif') == -1) {
        OnImgSrc = OnImgSrc.replace("_off.gif","_on.gif");
    } else {
        OnImgSrc = OnImgSrc.replace("_on.gif","_off.gif");
    }
    if (NS4 && OnReteg!="") {
        document.layers[OnReteg].document.images[KepNev].src = OnImgSrc;
    } else {
        document.images[KepNev].src = OnImgSrc;
    }
    return;
}

function ImgRestore() {
    if (NS4 && RetegAtad!="") {
	document.layers[RetegAtad].document.images[OutImg].src = OutImgSrc;
    } else {
	document.images[OutImg].src = OutImgSrc;
    }
}
		
function MM_swapImgRestore() { //v3.0
  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 MM_preloadImages() { //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_preloadImages.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_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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.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];}}