<!--
function hili(element, value){
         element.src = "files/" + (value ? "h_" : "") + element.id + ".gif";
}
function remove(element, string){
	if (element.value == string){element.value = "";}
}
function add(element, string){
	if (element.value == ""){element.value = string;}
}
function hell_dunkel(id,wert){
		var eva = document.getElementById(id).style;
		var ms  = wert * 100;
		eva.opacity = wert;
		eva.MozOpacity = wert;
		eva.KhtmlOpacity = wert;
		eva.filter = "progid:DXImageTransform.Microsoft.Alpha(Opacity=" + ms + ")";
		eva.filter = "alpha(opacity=" + ms + ")"; 
}
function hi(kennung){
		document.getElementById('nav_a').className = 'tn';
	    document.getElementById('nav_b').className = 'tn';
		document.getElementById('nav_c').className = 'tn';
		document.getElementById('nav_d').className = 'tn';
		document.getElementById('nav_e').className = 'tn';
		document.getElementById(kennung).className = 'tna';
		document.getElementById(kennung).blur();
		if (kennung == 'nav_b'){
		    hell_dunkel('eins','1');
		    hell_dunkel('zwei','0.5');
			hell_dunkel('fuenf','0.5');
			hell_dunkel('sechs','0.5');	
		}
}
function erscheine(id, geschwindigkeit) {
	// alten content verbergen
	document.getElementById('willkommen').style.display = "none";
	document.getElementById('referenzen').style.display = "none";
	document.getElementById('leistungen').style.display = "none";
	document.getElementById('kontakt').style.display    = "none";
	document.getElementById('impressum').style.display = "none";
	document.title = id.toUpperCase();
	var fps = Math.round(geschwindigkeit / 100); 
	var tmp = 0;
    for(i = 0; i <= 100; i++) {
        setTimeout("erscheine_opacity('" + id + "'," + i + ")", (tmp * fps));
        tmp++;
    }
	return false;
}
function erscheine_opacity(id, pas) {
	var eva = document.getElementById(id).style;
	if(pas > 0) {
		eva.opacity = (pas / 100);
		eva.MozOpacity = (pas / 100);
		eva.KhtmlOpacity = (pas / 100);
		eva.filter = "progid:DXImageTransform.Microsoft.Alpha(Opacity=" + pas + ")";
		eva.filter = "alpha(opacity=" + pas + ")"; 
	} else {
		eva.display = "block";
	}
	
}
function verberge(){
	document.getElementById('referenzen').style.display = "none";
	document.getElementById('leistungen').style.display = "none";
	document.getElementById('kontakt').style.display    = "none";
	document.getElementById('impressum').style.display = "none";
	//document.getElementById('willkommen').style.display = "none";
	//erscheine('willkommen', 1500);
}
//-->