function validateForm() {

	var form = document.getElementById('add_form');
	var site = form.site;
	var fullName = form.full_name;
	var telephone = form.telephone;
	var email = form.email;
	var captcha = form.captcha;
	var task = form.task;

	var forInform = document.getElementById("for_inform");

	if(!site.value.length || !fullName.value.length || !telephone.value.length || !email.value.length || !task.value.length || !captcha.value.length) {
		forInform.innerHTML = "<span class='error'>Вы заполнили не все обязательные поля</span>";
		return false;
	}
	return true;
}