function send_mail() {
	var form = document.getElementById('contact_form');
	var name = form.name;
	var email = form.email;
	var clave_teleph = form.clave_teleph;
	var city = form.city;
	var state = form.state;
	var st_w = form.st_w;
	var st_h = form.st_h;
	var posit = form.posit;
	var enterp = form.enterp;
	var event = form.event;
	var comment = form.comment;
	if (name.value != '' && clave_teleph.value !== '' && enterp.value !== '' && event.value !== '' && city.value !== '' && state.value !== '' && comment.value != '' && email.value != '') {
		if (!validarEmail(email)) {
			return false;
		}
		form.submit();
	} else {
		alert('Debe ingesar todos los datos correctamente');
	}
}

function cot_mail() {
	var form = document.getElementById('cot_form');
	var name = form.name;
	var email = form.email;
	var country = form.country;
	var city = form.city;
	var state = form.state;
	var prod = form.prod;
	var msg = form.msg;
	if (name.value != '' && state.value !== '' && city.value !== '' && country.value !== '' && prod.value !== '' && msg.value != '' && email.value != '') {
		if (!validarEmail(email)) {
			return false;
		}
		form.submit();
	} else {
		alert('Debe ingesar todos los datos correctamente');
	}
}

function recommend_mail() {
	var form = document.getElementById('recommend_form');
	var name = form.name;
	var email = form.email;
	var tname = form.tname;
	var temail = form.temail;
	var from = form.from;
	if (name.value != '' && tname.value !== '' && email.value != ''  && temail.value != '') {
		if (!validarEmail(email) || !validarEmail(temail)) {
			return false;
		}
		form.submit();
	} else {
		alert('Debe ingresar todos los datos correctamente');
	}
}


function validarEmail(cadena)  {
    var a = cadena.value;
    var filter=/^[A-Za-z][A-Za-z0-9_.]*@[A-Za-z0-9_]+.[A-Za-z0-9_.]+[A-za-z]$/;
        if ((a.length != 0) && (filter.test(a)))
            return true;
        else
            alert("Por favor, debe ingresar una dirección de correo válida");
        cadena.focus();
        return false;
}

function user_submit() {
	var form = document.getElementById('user_form');
	form.submit();
}