function bildwechsel(dateiname)
{
 // opacity('foto', 100, 0, 100);
 // setTimeout("document.images.foto.src = 'img/projekte/dummy.jpg'",150);
//  setTimeout("opacity('foto', 0, 100, 50)",200);
 // setTimeout("document.images.foto.src = 'img/projekte/"+ dateiname+"'",200);
  document.images.foto.src = 'img/projekte/' + dateiname+ '';
  document.getElementById('foto' + dateiname).style.color = '#A40102';
}


function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

// -------------------------------------
// -------------------------------------
// -------------------------------------

function boxzeigen(boxnr) 
{ 
	if (document.getElementById(boxnr).style.display == 'none')
	  document.getElementById(boxnr).style.display = '';
	else 
	  document.getElementById(boxnr).style.display = 'none';
}

function boxzeigen2(boxnr) 
{ 
	if (document.getElementById(boxnr).style.display == 'none')
	{
	  opacity(boxnr, 0, 100, 200);
	  document.getElementById(boxnr).style.display = '';
	}
	else 
	{
	  opacity(boxnr, 100, 0, 200);
    setTimeout("document.getElementById('"+boxnr+"').style.display = 'none'",200);
	}
}