// JavaScript Document
function verifForm(form) 
{
	
	if (form.nom.value == "" || form.prenom.value == "" || form.adresse.value == "" || form.cp.value == "" || form.ville.value == "" || form.tel.value == "" || form.email.value == "" || form.commentaires.value == "")
		
		{
			
			if(form.nom.value == "")
				{
					var nom = "\n- Nom";
				}
			else {var nom = "";}
			
			if(form.prenom.value == "")
				{
					var prenom = "\n- Prénom";
				}
			else {var prenom = "";}

			if(form.adresse.value == "") 
				{
					var adresse = "\n- Adresse";
				}
			else {var adresse = "";}
			
					
			if(form.cp.value == "") 
				{
					var cp = "\n- Code Postal";
				}
			else {var cp = "";}
			
					
			if(form.ville.value == "") 
				{
					var ville = "\n- Ville";
				}
			else {var ville = "";}

			if(form.tel.value == "") 
				{
					var tel = "\n- Téléphone";
				}
			else {var tel = "";}

			if(form.email.value == "") 
				{
					var email = "\n- E-mail";
				}
			else {var email = "";}

			if(form.commentaires.value == "") 
				{
					var commentaires = "\n- Commentaires";
				}
			else {var commentaires = "";}
					
					
		alert ('Veuillez remplir le(s) champs suivant(s) :' + nom + prenom + adresse + cp + ville + tel + email + commentaires); 
		return false;
				}

	var mail=document.form.email.value;
	 ctl = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+([\.][a-z0-9-]+)+$/;
	
	if (mail.search(ctl) != -1)/* {	if (form.email.value.indexOf('@') == -1 )*/
		{return true;}
	else
		{
		alert('Une adresse E-mail valide est nécessaire.');
		return false;
		}
		
	return true;
	
}

//////////////////////////////////////
// POPUP SUR IMAGE - TAILLE ADAPTEE //
//////////////////////////////////////
<!--
function resizePopUp(monImage, monTitre)
    {
	w = window.open('','chargement','width=10,height=10');
	w.document.write( "<html><head><title>"+monTitre+"</title>\n" );
	w.document.write( "<script language='JavaScript'>\n");
	w.document.write( "IE5=NN4=NN6=false;\n");
	w.document.write( "if(document.all)IE5=true;\n");
	w.document.write( "else if(document.getElementById)NN6=true;\n");
	w.document.write( "else if(document.layers)NN4=true;\n");
	w.document.write( "function autoSize() {\n");
	w.document.write( "if(IE5) self.resizeTo(document.images[0].width+10,document.images[0].height+31);\n");
	w.document.write( "else if(NN6) self.sizeToContent();\n");
	w.document.write( "else window.resizeTo(document.images[0].width,document.images[0].height+20);\n");
	w.document.write( "self.focus();\n");
	w.document.write( "}\n</scri");
	w.document.write( "pt>\n");
	w.document.write( "</head><body leftmargin=0 topmargin=0 marginwidth=0 marginheight=0 onLoad='javascript:autoSize();'>" );
	w.document.write( "<a href='javascript:window.close();'><img src='"+monImage+"' border=0 alt='"+monTitre+"'></a>" );
	w.document.write( "</body></html>" );
	w.document.close();
	}
//-->