// Check for email address: look for [@] and [.] 

function isEmail(elm) {
    if (elm.value.indexOf("@") + "" != "-1" &&
        elm.value.indexOf(".") + "" != "-1" &&
        elm.value != "") 
    return true;
    else return false;
}

// Check for null and for empty

function isFilled(elm) {
    if (elm.value == "" ||
        elm.value == null) 
    return false;
    else return true;
}

function isReady(form) {

    // is date element filled?

    if (isFilled(form.date) == false) {
    alert("Please enter the date.");
    form.date.focus();
    return false;
    }

    // is name element filled?

    if (isFilled(form.name) == false) {
    alert("Please enter your full name.");
    form.name.focus();
    return false;
    }

    // is company element filled?

    if (isFilled(form.company) == false) {
    alert("Please enter your company's name.");
    form.company.focus();
    return false;
    }

    // is city element filled?

    if (isFilled(form.city) == false) {
    alert("Please enter the city.");
    form.city.focus();
    return false;
    }

    // is state element filled?

    if (isFilled(form.state) == false) {
    alert("Please enter the state.");
    form.state.focus();
    return false;
    }
    
    // is email address element a real email address?

    if (isEmail(form.email) == false) { 
    alert("Please enter your email address.");
    form.email.focus();
    return false;
    }


    // is phone element filled?

    if (isFilled(form.phone) == false) {
    alert("Please enter your phone number.");
    form.phone.focus();
    return false;
    }


return true;
}