function isEmpty(s) {
     return ((s == null) || (s.length == 0))
    }

    function submitOrder(){
        if(isEmpty(document.forms['order'].first_name.value)){
            alert("Please enter your first name");
            return false;
        }
        if(isEmpty(document.forms['order'].last_name.value)){
            alert("Please enter your last name");
            return false;
        }
        if(isEmpty(document.forms['order'].street1.value)){
            alert("Please enter your address");
            return false;
        }
        if(isEmpty(document.forms['order'].city.value)){
            alert("Please enter your City");
            return false;
        }
        if(isEmpty(document.forms['order'].state.value)){
            alert("Please enter your State / County");
            return false;
        }
        if(isEmpty(document.forms['order'].telephone.value)){
            alert("Please enter your Telephone");
            return false;
        }
        if(isEmpty(document.forms['order'].email.value)){
            alert("Please enter your Email");
            return false;
        }
        if(document.forms['order'].email.value.indexOf("@") < 1) {
            alert("Please enter your valid email address");
            return false;
        }

        document.forms['order'].submit();
    }