var cur_header = 1;
headtimer = null;
maxHead = 6;

function chg_header() {
	document.getElementById("header").style.backgroundImage = "url(\"images/header"+cur_header+".jpg\")";
	headtimer = setTimeout("chg_header()",7000);
	if (cur_header == maxHead) {
		cur_header = 1;
	} else {
		cur_header++;
	}
}

function open_english() {
	winRef = window.open("index_en.html");
	winRef.getElementById('contentFrm').src = 'accueil_en.html';
}