var myLayer;
var out = '';
var currimgname = '';
var newimgname = '';
var allefilter = '';

//diverse browser
var dom = (document.getElementById) ? 1 : 0; 
var ie4x = (document.all && !document.getElementById ) ? 1 : 0; 
var ns4x = (document.layers) ? 1 : 0; 
var other = (!dom && !ie4x && !ns4x ) ? 1 : 0; 
var opera = (navigator.userAgent.indexOf('Opera')!=-1);


function findLayer(n, d) { //v4.01
	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 && d.getElementById) x=d.getElementById(n);

	return x;
}

//box um link entfernen
function nobox(){ 
	if (opera || other){return false;}
	if (ie4x){window.focus();} 
	if (dom){document.getElementById("fixbox").focus();} 
} 

//suchen ersetzen
function suchenersetzen(string,text,by) {

	var stringLength = string.length
	var textLength = text.length;
	if ((stringLength == 0) || (textLength == 0)) {
		return string;
	}

	var i = string.indexOf(text);
	if ((!i) && (text != string.substring(0,textLength))) {
		return string;
	}
	if (i == -1) {
		return string;
	}

	var newstr = string.substring(0,i) + by;
	if ( (i+textLength) < stringLength) {
		newstr += suchenersetzen(string.substring(i+textLength,stringLength),text,by);
	}
	return newstr;
}


//filterformular updaten
function udateFilterForm(filterid) {
	allefilter = document.forms.filterformular.allefilter.value;
	if (allefilter.indexOf('-'+filterid+'-')==-1) {
		allefilter = allefilter + filterid +'-';
	} else {
		allefilter = suchenersetzen(allefilter,'-'+filterid+'-','-');
	}
	document.forms.filterformular.allefilter.value = allefilter;

	//"alle anzeigen" icon
	if (allefilter=='-') {
		document.images['iconx'].src="siteimgs/symbols-on/symbolx.gif";
	} else {
		document.images['iconx'].src="siteimgs/symbols/symbolx.gif";
	}

	//neu 6.09: Seite gleich neu laden
	document.forms.filterformular.submit();
}


//filtericon austauschen
function setFilter(filterid) {

	//neu 6.09: Nur eine Auswahl moeglich; Seite gleich neu laden
	resetFilter(filterid);

	nobox();
	currimgname = document.images['icon'+filterid].src;
	if (currimgname.indexOf('symbols-on') ==-1) {
		newimgname = suchenersetzen(currimgname,'/symbols/','/symbols-on/');
	} else {
		newimgname = suchenersetzen(currimgname,'/symbols-on/','/symbols/');
	}
	document.images['icon'+filterid].src = newimgname;
	udateFilterForm(filterid);
}

//filter resetten (= alle beitraege)
function resetFilter(filterid) {
	nobox();

	allefilter = document.forms.filterformular.allefilter.value;
	var allefilterarray = allefilter.split('-');
	var maxfilter = allefilterarray.length-1;

	for (q=1;q<maxfilter;q++) {
		currimgname = document.images['icon'+ allefilterarray[q]].src;
		newimgname = suchenersetzen(currimgname,'/symbols-on/','/symbols/');
		document.images['icon'+ allefilterarray[q]].src = newimgname;
	}

	document.images['iconx'].src="siteimgs/symbols-on/symbolx.gif";
	document.forms.filterformular.allefilter.value = '-';

	//neu 06.09: sofort neu laden, wenn via button (und nicht via obige funktionen) aufgerufen
	if (!filterid || filterid=='') {
		document.forms.filterformular.submit();
	}
}