function errorOnLoad(request){
    alert("TODO : gestion d'erreur du chargement des questions\nErreur numéro: "+ request.status);
}

function beginTest() {
	var onlyUsual = document.getElementById("onlyUsual").checked;
	var numberElement = document.getElementById("numbersOfTest");
	var numberOptions = numberElement.options;
	var numberOfTest = numberOptions[numberElement.selectedIndex].value;

	var options= {
	    parameters:'number='+escape(numberOfTest)+'&isUsual='+escape(onlyUsual),
	    requestHeaders:["Content-Type","application/x-www-form-urlencoded"],
	    evalScripts: true,
	    onFailure: errorOnLoad,
	}
	new Ajax.Updater("test_content", "getTest/",options);
}