function initComponents(){
    document.getElementById('leftbar').style.height = (document.getElementById('middle').offsetHeight) + 'px'
}

var xmlHttp;

function GetXmlHttpObject(){
    var xmlHttp = null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp = new XMLHttpRequest();
    } 
    catch (e) {
        // Internet Explorer
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e) {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}

function sendMail(){
    if (document.getElementById("fname").value == "") {
        alert('Por favor inserte su nombre.');
        document.getElementById("fname").focus();
		return;
    }
    
    if (document.getElementById("femail").value == "") {
        alert('Por favor inserte su correo electrónico.');
        document.getElementById("femail").focus();
		return;
    }
    
	if (document.getElementById("country").value == "") {
        alert('Por favor inserte su país de residencia.');
        document.getElementById("country").focus();
		return;
    }
	
	if (document.getElementById("city").value == "") {
        alert('Por favor inserte su ciudad de residencia.');
        document.getElementById("city").focus();
		return;
    }
	
    if (document.getElementById("fcomments").value == "") {
        alert('Por favor inserte sus comentarios o preguntas.');
        document.getElementById("fcomments").focus();
		return;
    }
	
	if (document.getElementById("femail").value != document.getElementById("cemail").value) {
        alert('Su correo ' + document.getElementById("femail").value + ' no es igual al correo de confirmación ' + document.getElementById("cemail").value + ', por favor verificarlo.');
        document.getElementById("femail").focus();
		return;
    }
    
    xmlHttp = GetXmlHttpObject();
    if (xmlHttp == null) {
        alert("Your browser does not support AJAX!");
        return;
    }
    xmlHttp.onreadystatechange = function(){
        if (xmlHttp.readyState == 4) {
            if (xmlHttp.responseText == "0") {
                alert("Su mensaje ha sido enviado. Usted será redireccionado.");
                window.location = 'gracias.php';
            }
            else {
                alert(xmlHttp.responseText);
            }
        }
    };
    var url = "name=" + document.getElementById("fname").value + "&email=" + document.getElementById("femail").value;
    url += "&country=" + document.getElementById("country").value;
    url += "&city=" + document.getElementById("city").value;
	url += "&know=" + document.getElementById("know").value;
	url += "&comments=" + document.getElementById("fcomments").value;
	url += "&age=" + document.getElementById("age").value;
	url += "&height=" + document.getElementById("height").value;
	url += "&weight=" + document.getElementById("weight").value;
	url += "&diseases=" + document.getElementById("diseases").value;
	url += "&treatments=" + document.getElementById("treatments").value;
	url += "&diabetes=" + document.getElementById("diabetes").value;
	url += "&occupation=" + document.getElementById("occupation").value;
	url += "&overweight=" + document.getElementById("overweight").value;
	url += "&increased=" + document.getElementById("increased").value;
	url += "&surgery=" + document.getElementById("surgery").value;
    xmlHttp.open("POST", "services/email_services.php", true);
    xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlHttp.send(url);
}