function aff_kaki() {
			document['cours'].src = "images/cours_kaki.jpg";	
			document['bgc'].src = "images/kaki.jpg";
		}
		function eff_kaki() {
			document['cours'].src = "images/cours.jpg";	
			document['bgc'].src = "images/gris.jpg";
		}	
		function aff_mauve() {
			document['conseil'].src = "images/conseil_mauve.jpg";	
			document['bgc'].src = "images/mauve.jpg";
		}
		function eff_mauve() {
			document['conseil'].src = "images/conseil.jpg";
			document['bgc'].src = "images/gris.jpg";
		}
		function aff_orange() {
			document['surmesure'].src = "images/surmesure_orange.jpg";			
			document['bgc'].src = "images/orange.jpg";
		}
		function eff_orange() {
			document['surmesure'].src = "images/surmesure.jpg";
			document['bgc'].src = "images/gris.jpg";
		}
		function aff_actu() {
			document['qui'].src = "images/qui.jpg";
			document['actu'].src = "images/actu_gris.jpg";
		}
		function eff_actu() {
			document['qui'].src = "images/qui_gris.jpg";
			document['actu'].src = "images/actu.jpg";
		}
		function aff_contacts() {
			document['qui'].src = "images/qui.jpg";
			document['contacts'].src = "images/contact_gris.jpg";
		}
		function eff_contacts() {
			document['qui'].src = "images/qui_gris.jpg";
			document['contacts'].src = "images/contact.jpg";
		}
		function popuptxt (nomfichier) {
			window.open(nomfichier,'fenetre','width=350, height=450, scrollbars=yes');
		}
		function MM_findObj(n, d) { //v4.01
		var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
			d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
			if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
			for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
			if(!x && d.getElementById) x=d.getElementById(n); return x;
		}
		
		function MM_changeProp(objName,x,theProp,theValue) { //v6.0
			var obj = MM_findObj(objName);
			if (obj && (theProp.indexOf("style.")==-1 || obj.style)){
			if (theValue == true || theValue == false)
			eval("obj."+theProp+"="+theValue);
			else eval("obj."+theProp+"='"+theValue+"'");
			}
		}
		
		function validation() 
		{ 	
        var email = document.formulaire.email.value; 
       	if(document.formulaire.nom.value == "") 
		{ 
        alert ('Veuillez entrer votre nom'); 
        document.formulaire.nom.focus(); 
        return false; 
    	}
        if (email.search(/^[_a-z0-9-]+(.[_a-z0-9-]+)*[^._-]@[a-z0-9-]+(.[a-z0-9]{2,4})*$/) == -1)
        { 
            alert ('Veuillez entrer une adresse email valide'); 
            document.formulaire.email.focus(); 
            return false; 
        } 
		if(document.formulaire.texte.value == "") 
		{ 
        alert ('Veuillez entrer un message'); 
        document.formulaire.texte.focus(); 
        return false; 
    	}
		else {return true;}
		}