window.addEvent('domready', function() {
	
	var textDefault = "votre email...";
	
	$('id_email').addEvents({
		
		'focus': function(e){ 
			if (this.value == textDefault)
				this.value = "";
		},	
		
		'blur' : function(e){ 
			if (this.value == "") 
				this.value = textDefault;
		}
		
	});

});