function checkFormSubmit(fields,classeDefaut,classeError,idForm)
{   
    fieldlist = fields.split(",");
    error = 0;
    for(i=0; i<fieldlist.length; i++){
		if(fieldlist[i] == 'mail')
		{
			var email=document.getElementById(fieldlist[i]).value

			if ((email.indexOf('@',0)==-1) || (email.indexOf('.',0)==-1))
			{
				// l'adresse entrée est incorrecte
				alert("adresse email incorrecte");
				error++;
			}
		}
        if(fieldlist[i] !== '' && document.getElementById(fieldlist[i]).value== '')
        {
            document.getElementById(fieldlist[i]).className = classeError;
            if(error==0) document.getElementById(fieldlist[i]).focus();
           
            error++;
        } else if(fieldlist[i] !== '') {
            document.getElementById(fieldlist[i]).className = classeDefaut;
        }
    }

    if(error == 0)
    {
        document.getElementById(idForm).submit();
    }
}

function changeImage(img,url,id)
{
	document.getElementById('big_pict').src = url+"/normal/"+id+"/"+img;
	document.getElementById('big_pict_href').href = url+"/grand/"+id+"/"+img;
}

/* la calculette */
function MM_findObjCalc(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_findObjCalc(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function calcul(what)
{
	var T;
switch(what) {
	case 'mens':
		T = MM_findObjCalc( "mens_taux" ).value.replace(',','.')/100;
		if ((T<0.02) || (T>0.09))
			alert('Vous devez saisir un taux situé entre 2% et 9%');
		else {
			t = T/12;
			C = MM_findObjCalc( "mens_emprunt" ).value.replace(',','.');
			n = MM_findObjCalc( "mens_nbmens" ).value.replace(',','.');
			if (MM_findObjCalc( "mens_duree" )[1].checked) {
				n *= 12;
			}
			if( n == 0 ){
				alert("Vous devez saisir une durée d'emprunt");
			} else {
				MM_findObjCalc( "mens_mens" ).value = Math.round(100*C*(t/(1-(1/Math.pow(1+t,n)))))/100; }
			}
		break;
	case 'emprunt':
		T = MM_findObjCalc( "emprunt_taux" ).value.replace(',','.')/100;
		if ((T<0.02) || (T>0.09))
			alert('Vous devez saisir un taux situé entre 2% et 9%');
		else {
			t = T/12;
			//n = MM_findObjCalc( "emprunt_nbmens" ).value.replace(',','.');
			n = MM_findObjCalc( "emprunt_nbmens" ).value.replace(',','.');
			if (MM_findObjCalc( "emprunt_duree" )[1].checked) {
				n *= 12;
			}
			m = MM_findObjCalc( "emprunt_mens" ).value.replace(',','.');
			MM_findObjCalc( "emprunt_emprunt" ).value = Math.round(m*((1-(1/Math.pow(1+t,n)))/t)); }
		break;
	case 'nbmens':
		T = MM_findObjCalc( "nbmens_taux" ).value.replace(',','.')/100;
		if ((T<0.02) || (T>0.09))
			alert('Vous devez saisir un taux situé entre 2% et 9%');
		else {
			t = T/12;
			C = MM_findObjCalc( "nbmens_emprunt" ).value.replace(',','.');
			m = MM_findObjCalc( "nbmens_mens" ).value.replace(',','.');
			MM_findObjCalc( "nbmens_nbmens" ).value = Math.round(Math.log(-1/(((C/m)*t)-1))/Math.log(1+t));
			MM_findObjCalc( "nbmens_nbmens" ).value += ' mois (' + Math.round(MM_findObjCalc( "nbmens_nbmens" ).value/12) + ' an' + ((Math.round(MM_findObjCalc( "nbmens_nbmens" ).value/12)>1)?'s':'') + ')'; }
		break;
	};
}

function survolCadre(id)
{
	if(document.getElementById(id).className == 'cadre')
		document.getElementById(id).className = 'cadreOver';
	else
		document.getElementById(id).className = 'cadre';
}

function afficher(id_zone,html)
{
	var id_a_afficher = document.getElementById(id_zone);
	id_a_afficher.innerHTML = html;
	id_a_afficher.style.display = 'block';
}

function cache(id_zone,html)
{
	document.getElementById(id_zone).innerHTML = html;
}