function show_opening(alt_boven,alt_midden,alt_onder) {
document.write ('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" '
                + 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" '
                + 'WIDTH=1004 HEIGHT=768><param name="wmode"><PARAM NAME=movie VALUE="../vv_opening.swf?alt_boven='+alt_boven+'&alt_midden='+alt_midden+'&alt_onder='+alt_onder+''+document.location.search+'">'
                + '<PARAM NAME=quality VALUE=high><param name="wmode" value="transparent"><EMBED src="../vv_opening.swf?alt_boven='+alt_boven+'&alt_midden='+alt_midden+'&alt_onder='+alt_onder+''+document.location.search+'" menu=false quality=high scale=exactfit wmode=transparent WIDTH="1004" HEIGHT="768" NAME="streamer" ALIGN="" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED>'
                + '</OBJECT>')
        }