function checkform()
{
    var fname = document.getElementById('fname').value;
    var lname = document.getElementById('lname').value;
    var company = document.getElementById('company').value;
    var email = document.getElementById('email').value;
    var phone = document.getElementById('phone').value;
    var message = document.getElementById('message').value;
    var whatis = document.getElementById('whatis').value;
    if (fname == "") 
    {
        alert('Please enter your First name');
        return false;
    } 
    else 
    {
        
    }
    
    if (lname == "") 
    {
        alert('Please enter your Last name');
        return false;
    } 
    else 
    {
        
    }
    
    if (company== "") 
    {
        alert('Please enter Company Name');
        return false;
    } 
    else 
    {
        
    }
    if (email == "") 
    {
        alert('Please enter valid Email address');
        return false;
    } 
    else 
    {
        
    }
    if (phone == "") 
    {
        alert('Please enter your phone number');
        return false;
    } 
    else 
    {
        
    }
    if (message == "") 
    {
        alert('Please enter message');
        return false;
    } 
    else 
    {
        
    }
    if (whatis != "7") 
    {
        alert('Oops please calculate again!');
        return false;
    } 
    else 
    {
        
    }
    
}