function changePicture(Ereignis)
{
	if(!Ereignis)
	{
		var taste = window.event;
	}
	else
	{
		var taste = Ereignis;
	}
	
	var searchedElement = document.getElementById("shDisplay"); 
	if (searchedElement)
	{
		if (taste.keyCode) 
		{
  			var Tastencode = taste.keyCode;
		} 
		else 
		{
    		var Tastencode = taste.which;
		}

		switch(Tastencode)
		{
  		case 39:
  			var next_picture = document.getElementById("naechstes_bild");
  			if (next_picture)
  			{
 				next_picture = next_picture.innerHTML;
				eval(next_picture);
			}
			break
		case 37:
			var prev_picture = document.getElementById("vorheriges_bild");
			if (prev_picture)
			{
				prev_picture = prev_picture.innerHTML;
				eval(prev_picture);
			}
			break
 		case 27: 
			shutterReloaded.hideShutter();
 			break
		default:
			break
		}	
	}
}

function closePictureViewer(Ereignis)
{
	var searchedElement = document.getElementById("shDisplay"); 
	if (searchedElement)
	{
		if(!Ereignis)
		{
			var taste = window.event;
		}
		else
		{
			var taste = Ereignis;
		}
		
		if((taste.which == 1) || (taste.button == 1))
		{
			shutterReloaded.hideShutter();
		}
	}	
}