function mOver(a) {
	document.getElementById('nav' + a).src='images/nav/' + a + 'a.gif';	
}
function mOut(a) {
	document.getElementById('nav' + a).src='images/nav/' + a + '.gif';
}

function picClick(a) {
	document.getElementById('pix').src='' + a + '_gr.jpg';
}

function pPopup(a,b) {
var ns4up = (document.layers) ? 1 : 0
var ie4up = (document.all) ? 1 : 0
var xsize = screen.width
var ysize = screen.height
var breite=xsize/2
var hoehe=ysize/2

	if (b == 'h'){
		var xpos=(xsize-breite)/2 + 160
		var ypos=(ysize-hoehe)/2
		window.open("popup.php?pic=" + a + "&format=" + b + "","","scrollbars=no,status=no,toolbar=no,location=no,directories=no,resizable=no,menubar=no,width=290,height=400,screenX="+xpos+",screenY="+ypos+",top="+ypos+",left="+xpos)
	}else if (b == 'q'){
		var xpos=(xsize-breite)/2
		var ypos=(ysize-hoehe)/2
		window.open("popup.php?pic=" + a + "&format=" + b + "","","scrollbars=no,status=no,toolbar=no,location=no,directories=no,resizable=no,menubar=no,width=620,height=400,screenX="+xpos+",screenY="+ypos+",top="+ypos+",left="+xpos)
	}
}