function checkFormVars()
{

    var fname = document.forms[0].fname.value.replace(/\s/g, '');
    var lname = document.forms[0].lname.value.replace(/\s/g, '');
    var zipcode = document.forms[0].zipcode.value.replace(/\s/g, '');
    var email = document.forms[0].email.value.replace(/\s/g, '');

    if(fname.length == 0) {
        alert("'First Name' is required");
        return(false);
    }

    if(lname.length == 0) {
        alert("'Last Name' is required");
        return(false);
    }

    if(zipcode.length == 0) {
        alert("'Zipcode' is required");
        return(false);
    }
    if(email.length == 0) {
        alert("'Email address' is required");
        return(false);
    } else {
        var str = document.forms[0].email.value;
        if (((str.indexOf(".") > 2) && (str.indexOf("@") > 0)) == false) {
            alert('Invalid E-Mail Address.');
            return false;
        }

    }




}