function PopupCentrer(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}


function closeWindow() {
	window.close();
	}




function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}



function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_01_nav_02_over = newImage("images/nav_01-nav_02_over.gif");
		nav_02_over = newImage("images/nav_02-over.gif");
		nav_03_nav_02_over = newImage("images/nav_03-nav_02_over.gif");
		nav_03_over = newImage("images/nav_03-over.gif");
		nav_04_nav_02_over = newImage("images/nav_04-nav_02_over.gif");
		nav_04_over = newImage("images/nav_04-over.gif");
		nav_05_nav_02_over = newImage("images/nav_05-nav_02_over.gif");
		nav_05_over = newImage("images/nav_05-over.gif");
		nav_06_nav_02_over = newImage("images/nav_06-nav_02_over.gif");
		nav_06_over = newImage("images/nav_06-over.gif");
		nav_07_nav_02_over = newImage("images/nav_07-nav_02_over.gif");
		nav_08_nav_02_over = newImage("images/nav_08-nav_02_over.gif");
		nav_para_03_over = newImage("images/nav-para_03-over.gif");
		nav_para_04_over = newImage("images/nav-para_04-over.gif");
		nav_para_05_over = newImage("images/nav-para_05-over.gif");
		nav_para_06_over = newImage("images/nav-para_06-over.gif");
		nav_para_07_over = newImage("images/nav-para_07-over.gif");
             escalade_nav_03_over = newImage("images/escalade/escalade-nav_03-over.gif");
		escalade_nav_04_over = newImage("images/escalade/escalade-nav_04-over.gif");
		escalade_nav_05_over = newImage("images/escalade/escalade-nav_05-over.gif");
		escalade_nav_06_over = newImage("images/escalade/escalade-nav_06-over.gif");
		escalade_nav_07_over = newImage("images/escalade/escalade-nav_07-over.gif");
		Via_ferrata_nav_03_over = newImage("images/Via-ferrata_nav_03-over.gif");
		Via_ferrata_nav_04_over = newImage("images/Via-ferrata_nav_04-over.gif");
		Via_ferrata_nav_05_over = newImage("images/Via-ferrata_nav_05-over.gif");
		Via_ferrata_nav_06_over = newImage("images/Via-ferrata_nav_06-over.gif");
		Via_ferrata_nav_07_over = newImage("images/Via-ferrata_nav_07-over.gif");
		rando_nav_04_over = newImage("images/rando-nav_04-over.gif");
		rando_nav_05_rando_nav_10_over = newImage("images/rando-nav_05-rando-nav_10_o.gif");
		rando_nav_06_over = newImage("images/rando-nav_06-over.gif");
		rando_nav_07_over = newImage("images/rando-nav_07-over.gif");
		rando_nav_08_over = newImage("images/rando-nav_08-over.gif");montagne_nav_04_over = newImage("images/montagne-nav_04-over.gif");
		montagne_nav_05_over = newImage("images/montagne-nav_05-over.gif");
		montagne_nav_06_over = newImage("images/montagne-nav_06-over.gif");
		montagne_nav_07_over = newImage("images/montagne-nav_07-over.gif");
		montagne_nav_08_over = newImage("images/montagne-nav_08-over.gif");
		preloadFlag = true;
	}
}

//D'autres scripts sur http://www.toutjavascript.com
//Si vous utilisez ce script, merci de m'avertir !  < webmaster@toutjavascript.com >
var taux=6.55957; var lequel=""; var lautre="";
var valeur=0;
function conv(f) {
	if (lequel=="euro") {valeur=Math.round(100*parseFloat(f.elements[lequel].value)*taux)/100;}
	if (lequel=="franc")  {valeur=Math.round(100*parseFloat(f.elements[lequel].value)/taux)/100;}
	if (isNaN(valeur)) {
		return false;	
	} else {
		return true;
	}
}

function Start() {
	if (lequel!="") {
		var f=document.forms["conveuro"];
		if (conv(document.forms["conveuro"])) {
			document.forms["conveuro"].elements[lautre].value=valeur;
		}
		// astuce pour netscape !
		if (document.layers) {
			document.forms["conveuro"].elements[lequel].blur()
			document.forms["conveuro"].elements[lequel].focus()
		}
	}
	setTimeout("Start()",100);
}

// Dans la balise BODY, ajouter onload="Start()"