function check_surveys_vote_form() {
	return check_surveys_block_form();	
}

function check_surveys_block_form() {

	var el = document.getElementsByName("radio_survey");

	var found = 0;
	var i = 0;
	for (i=0;i<el.length;i++){
		if (el[i].checked==true) {
			found = 1;
			break;
		}
	}
	
	if(found == 0) {
		alert("Vous devez choisir une option!");
		return false;	
	}
	
	return true;
	
}