function openMention(){
	var top=(screen.height-410)/2;
	var left=(screen.width-300)/2;
window.open("mentions.php","","top="+top+",left="+left+",width=300,height=410,menubar=no,scrollbars=yes,statusbar=no");
}
function openCredit(){
	var top=(screen.height-300)/2;
	var left=(screen.width-250)/2;
window.open("credits.php","","top="+top+",left="+left+",width=250,height=300,menubar=no,scrollbars=no,statusbar=no");
}
function openMentionEn(){
	var top=(screen.height-410)/2;
	var left=(screen.width-300)/2;
window.open("mentionsEn.php","","top="+top+",left="+left+",width=300,height=410,menubar=no,scrollbars=yes,statusbar=no");
}