Element.implement({  
	appendHTML: function(html,where){  
		return this.grab(new Element('text',{'html':html}),where);  
	}  
}); 

var validForm = function(){
	var val = true;
	$('warnings').set('text', '');
	var name = $('f-author-name').get('value');
	var mail = $('f-author-email').get('value');
	var mess = $('f-message').get('value');
	
	if(name == null || name == ""){
		$('warnings').appendHTML('<p>Le nom de l\'auteur est requis</p>');
		val = false;
	}
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(mail == null || mail == "" || reg.test(mail) == false){
		$('warnings').appendHTML('<p>Une adresse email valide est requise</p>');
		val = false;
	}
	if(mess == null || mess == ""){
		$('warnings').appendHTML('<p>Le message requis</p>');
		val = false;
	}
	
	return val;
};