//fuer das menu
active_pic = 'menu6-aktiv.png';


//fuer das scrollen ohne scrollbar
function startScroll(dir) {
	pe = new PeriodicalExecuter(function() {mittel_iframe.scrollBy(0,dir*sdr);}, 0.1);
}

function stopScroll() {
	if (pe) pe.stop();
}

function wheel(event) 
{ 

    var delta = 0; 

    if (!event) 
    { 
        event = window.event;
    } 

    if (event.wheelDelta) 
    { 
        delta = event.wheelDelta/120; 
        if (window.opera) 
        { 
            delta = -delta;
        } 
    } 

    else if (event.detail) 
      { 
        delta = -event.detail/3;
    } 

      if (delta) 
    {    
        if (delta < 0) 
        { 
            window.scrollBy(0,sdr); 
        } 
        else 
        { 
            window.scrollBy(0,-sdr);
        } 
    } 
} 




if (window.addEventListener) { window.addEventListener('DOMMouseScroll', wheel, false); } 

window.onmousewheel = document.onmousewheel = wheel; 


/* function setsdr() 
{ 
    if (window.innerHeight)
    {
        sdr = window.innerHeight*0.15;
    }
    else if (document.documentElement && document.documentElement.clientHeight)
    {
        sdr = document.documentElement.clientHeight*0.15;
    }
    else if (document.body)
    {
        sdr = document.body.clientHeight*0.15;
    }

    // alert('debug');
} 

window.onload = setsdr; 
window.onresize = setsdr;
*/

sdr = 317*0.15;

// für die Bilder
var request = false;

function _request_dump() {

	switch(request.readyState) {
  	case 4:
		if(request.status!=200) {
		
			alert("Der Request wurde abgeschlossen ist aber nicht OK\nFehler:"+request.status); 
		
		}else{
			foo.innerHTML=request.responseText;
			
		}
  	break;
	
  	default:
  	break;
		 
	}

}

function reader(tag, coname, target_div) {

        if (window.XMLHttpRequest) { 

            request = new XMLHttpRequest(); //Mozilla, Safari,Opera

        } else if (window.ActiveXObject) { 

            try {

                request = new ActiveXObject("Msxml2.XMLHTTP"); //IE 5

            } catch (e) {

                try {

                    request = new ActiveXObject("Microsoft.XMLHTTP"); //IE 6

                } catch (e) {}

            }

        }

        if (!request) {

            alert('Kann keine XMLHTTP-Instanz erzeugen');
            return false;

        }else{
        request.open("get", 'pics.php?tag='+tag+'&concert_name='+coname, true);
		changeText(target_div);
		foo=document.getElementById(target_div);
       request.onreadystatechange=_request_dump;
        request.send(null);
        }

}

function loadConcert(tag,coname,target_div) {
	
        if (window.XMLHttpRequest) { 

            request = new XMLHttpRequest(); //Mozilla, Safari,Opera

        } else if (window.ActiveXObject) { 

            try {

                request = new ActiveXObject("Msxml2.XMLHTTP"); //IE 5

            } catch (e) {

                try {

                    request = new ActiveXObject("Microsoft.XMLHTTP"); //IE 6

                } catch (e) {}

            }

        }

        if (!request) {

            alert('Kann keine XMLHTTP-Instanz erzeugen');
            return false;

        }else{
        request.open("get", 'pics.php?tag='+tag+'&concert_name='+coname, true);
		$('fotos').hide();
		foo=document.getElementById(target_div);
		$('foto_navi').show();
       request.onreadystatechange=_request_dump;
        request.send(null);
        }
}

/*
function changeText(id) {
document.getElementById("news").style.visibility = "hidden";
document.getElementById("crew").style.visibility = "hidden";
document.getElementById("gigs").style.visibility = "hidden";
document.getElementById("musik").style.visibility = "hidden";
document.getElementById("downloads").style.visibility = "hidden";
document.getElementById("kaufen").style.visibility = "hidden";
document.getElementById("presse").style.visibility = "hidden";
document.getElementById("shirts").style.visibility = "hidden";
document.getElementById("fotos").style.visibility = "hidden";
document.getElementById("foto_navi").style.visibility = "hidden";
document.getElementById("foto_gross").style.visibility = "hidden";
document.getElementById("pegasus").style.visibility = "hidden";
document.getElementById("kontakt").style.visibility = "hidden";
document.getElementById("gbook").style.visibility = "hidden";
document.getElementById("link").style.visibility = "hidden";
document.getElementById("impressum").style.visibility = "hidden";
document.getElementById(id).style.visibility = "visible";
}
*/

	function changeText(seite) {
		$('mittel_iframe').src = 'frame.php?seite=' + seite;
	}
function showImage(datei) {
var foo=document.getElementById('foto_gross');
foo.innerHTML='<a href="javascript:hideImage()">zur&uuml;ck</a><br><img src="'+datei+'">';
$("foto_navi").hide();
$("foto_gross").show();
}

function hideImage() {
$("foto_gross").hide();
$("foto_navi").show();
}