function validateForm()
{
    var frm = document.getElementById('contactform');
    
    if(frm.name.value<='')
    {
        alert('Please enter your name.');
        frm.name.focus();
        return false;
    }
    if(frm.phone.value<='')
    {
        alert('Please enter your day time phone number.');
        frm.name.focus();
        return false;
    }
    if(frm.email.value<='')
    {
        alert('Please enter your email address.');
        frm.email.focus();
        return false;
    }
    else
    {
        if(!isEmail(frm.email.value))
        {
            alert('Please enter a valid email address.');
            frm.email.focus();
            return false;
        }
    }
    if(frm.message.value <= '')
    {
    	alert('Please provide a few words about further information you require.');
        frm.message.focus();
        return false;
    }
    frm.submit();
}