function isemail(str) {
   return (str.indexOf(" ") < 0) && 
		  (str.indexOf("/") < 0) && 
		  (str.indexOf("\\") < 0)&& 
		  (str.indexOf("&") < 0) && 
		  (str.indexOf(".") > 2) && 
		  (str.indexOf("@") > 0);
}


function validate(){

var name = document.getElementById('name').value;
var web = document.getElementById('web').checked;
var ecommerce = document.getElementById('ecommerce').checked;
var seo = document.getElementById('seo').checked;
var phone = document.getElementById('phone').value;
var email = document.getElementById('email').value;
var validation = true;

if (name == '') { 
document.getElementById('name_er').style.display = "block";
validation = false;
}else{
document.getElementById('name_er').style.display = "none";
}

if (!web && !ecommerce && !seo) { 
document.getElementById('check_er').style.display = "block";
validation = false;
}else{
document.getElementById('check_er').style.display = "none";
}

if (!(isemail(email))) { 
document.getElementById('email_er').style.display = "block";
validation = false;
}else{
document.getElementById('email_er').style.display = "none";
}

if (isNaN(phone.replace(/-/g, "")) || phone == '' ) { 
document.getElementById('phone_er').style.display = "block";
validation = false;
}else{
document.getElementById('phone_er').style.display = "none";
}

return validation;

}


function onkeyname(){
var name = document.getElementById('name').value;
if (name == '') { 
document.getElementById('name_er').style.display = "block";
}else{
document.getElementById('name_er').style.display = "none";
}
}

function oncheck(){
var web = document.getElementById('web').checked;
var ecommerce = document.getElementById('ecommerce').checked;
var seo = document.getElementById('seo').checked;
if (!web && !ecommerce && !seo) { 
document.getElementById('check_er').style.display = "block";
}else{
document.getElementById('check_er').style.display = "none";
}
}

function onkeyphone(){
var phone = document.getElementById('phone').value;
if (isNaN(phone.replace(/-/g, "")) || phone == '' ) { 
document.getElementById('phone_er').style.display = "block";
}else{
document.getElementById('phone_er').style.display = "none";
}
}


function onkeyemail(){
var email = document.getElementById('email').value;
if (!(isemail(email))) { 
document.getElementById('email_er').style.display = "block";
}else{
document.getElementById('email_er').style.display = "none";
}
}