function ask_desinscription()
{
	Ext.MessageBox.show({
		title:'Desinscription',
		msg: 'Voulez-vous vous désinscrire de DefiJob ?',
		buttons: Ext.MessageBox.YESNO,
		fn: function(btn) {
			if(btn == 'yes')
			{
				Ext.Ajax.request({
					url: 'desinscription_query.php',
					method: 'POST',
					success: function(response) {
						var rep = Ext.decode(response.responseText);
						Ext.MessageBox.alert('Desinscription', rep.message);
					}
				});
			}
		},
		icon: Ext.MessageBox.INFO
	});
}