function show_menu(choix) {

	document.getElementById('menu_societe').style.visibility = 'hidden';
	document.getElementById('menu_systemes').style.visibility = 'hidden';
	document.getElementById('menu_applications').style.visibility = 'hidden';
	document.getElementById('menu_sites').style.visibility = 'hidden';
	document.getElementById('menu_'+choix).style.visibility = 'visible';
}

function hide_menu() {

	document.getElementById('menu_societe').style.visibility = 'hidden';
	document.getElementById('menu_systemes').style.visibility = 'hidden';
	document.getElementById('menu_applications').style.visibility = 'hidden';
	document.getElementById('menu_sites').style.visibility = 'hidden';
}

function show_ssmenu(choix) {

	document.getElementById('ssmenu_hotline').style.visibility = 'hidden';
	document.getElementById('ssmenu_espace').style.visibility = 'hidden';
	document.getElementById('ssmenu_'+choix).style.visibility = 'visible';
}

function hide_ssmenu() {

	document.getElementById('ssmenu_hotline').style.visibility = 'hidden';
	document.getElementById('ssmenu_espace').style.visibility = 'hidden';

}

function change_onglet(onglet) {
	
	document.getElementById('titre_onglets').style.background = 'url(images/onglet_'+onglet+'_fond.png)';
	document.getElementById('atout').style.color="#000000";
	document.getElementById('references').style.color = '#000000';
	document.getElementById('lexique').style.color = '#000000';
	document.getElementById(onglet).style.color = '#ffffff';
	document.getElementById('onglet_atout').style.visibility = 'hidden';
	document.getElementById('onglet_references').style.visibility = 'hidden';
	document.getElementById('onglet_lexique').style.visibility = 'hidden';
	document.getElementById('onglet_'+onglet).style.visibility = 'visible';

}




function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

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_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function verif_mail()
{
	if (document.form_contact.nom.value=='')
	{
	alert("veuillez saisir un nom");
	document.form_contact.nom.focus();
	return false;
	}
	if (document.form_contact.prenom.value=='')
	{
	alert("veuillez saisir un prenom");
	document.form_contact.prenom.focus();
	return false;
	}
	if (document.form_contact.telephone.value=='' || isNaN(document.form_contact.telephone.value))
	{
	alert("veuillez saisir un numéro de téléphone");
	document.form_contact.telephone.focus();
	return false;
	}
	
	if (document.form_contact.ville.value=='')
	{
	alert("veuillez saisir une ville");
	document.form_contact.ville.focus();
	return false;
	}
		
	var adresse = document.form_contact.email.value;
	var place = adresse.indexOf("@",1);
	var point = adresse.indexOf(".",place+1);
	if (!((place > -1)&&(adresse.length >2)&&(point > 1))) 
	{
		alert('Entrez une adresse e-mail valide svp!');
		document.form_contact.email.focus();
		return false;
	}


return true;
}

function verif_news()
{
var adresse = document.form_news.email.value;
	var place = adresse.indexOf("@",1);
	var point = adresse.indexOf(".",place+1);
	if (!((place > -1)&&(adresse.length >2)&&(point > 1))) 
	{
		alert('Entrez une adresse e-mail valide svp!');
		document.form_news.email.focus();
		return false;
	}
}