function checkUCEmail(email) {
    // a very simple email validation checking. 
    // you can add more complex email checking if it helps 
    if(email.length <= 0) {
      email.value = 'EMAIL';
      return false;
    }
    var splitted = email.value.match("^(.+)@(.+)$");
    if (splitted == null) {
        email.value = 'EMAIL';
        return false;
    }
    if (splitted[1] != null ) {
        var regexp_user=/^\"?[\w-_\.]*\"?$/;
        if (splitted[1].match(regexp_user) == null) {
            email.value = 'EMAIL';
            return false;
        }
    }
    if(splitted[2] != null) {
        var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
        if (splitted[2].match(regexp_domain) == null) {
            var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
            if (splitted[2].match(regexp_ip) == null) {
                email.value = 'EMAIL';
                return false;
            }
        } // if
        return true;
    }
    email.value = 'EMAIL';
    return false;
}

function clearUCField(element) {
    var elem = element.value;
    if (elem == 'NAME' || elem == 'POSTAL' || elem == 'ADDRESS' || elem == 'UCE' || elem == 'CITY' || elem == 'EMAIL') {
        element.value = '';
    } else if (elem == 'URL (OPTIONAL)') {
        element.value = 'http://';
    }
}

function checkUCName(entrantname) {
    if (entrantname.value.length < 2) {
        entrantname.value = 'NAME';
        return false;
    } else if (entrantname == 'NAME') {
        return false;
    } else {
        return true;
    }
}

function checkUCAddress(address) {
    if (address.value.length < 6) {
        address.value = 'ADDRESS';
        return false;
    } else if (address == 'ADDRESS') {
        return false;
    } else {
        return true;
    }
}

function checkUCCity(city) {
    if (city.value.length < 3) {
        city.value = 'CITY';
        return false;
    } else if (city == 'CITY') {
        return false;
    } else {
        return true;
    }
}

function checkUCState(state) {
    var myindex = state.selectedIndex;
    var SelValue = state.options[myindex].value
    
    if (SelValue.length == 0) {
        state.options[myindex].text = 'STATE';
        return false;
    } else if (state.options[myindex].selected == 'STATE') {
        return false;
    } else {
        return true;
    }
}

function checkUCCategory(category) {
    var myindex = category.selectedIndex;
    var SelValue = category.options[myindex].value
    
    if (SelValue.length == 0) {
        category.options[myindex].text = 'CATEGORY';
        return false;
    } else if (category.options[myindex].selected == 'CATEGORY') {
        return false;
    } else {
        return true;
    }
}

function checkUCPostal(postal) {
    if (postal.value.length < 3) {
        postal.value = 'POSTAL';
        return false;
    } else if (postal.value == 'POSTAL') {
        return false;
    } else {
        return true;
    }
}

function checkUCAge(age) {
    if (age.value.length != 2) {
        age.value = 'AGE';
        return false;
    } else if (age.value == 'AGE') {
        return false;
    } else {
        return true;
    }
}

function checkUCUrl(url) {
    if (url.value.length < 1) {
        url.value = "URL (OPTIONAL)";
        return true;
    } else if (url.value == 'http://') {
        url.value = "URL (OPTIONAL)";
        return true;
    } else if (url == 'URL (OPTIONAL)') {
        return true;
    } else if (url.length > 0) {
        var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
        return regexp.test(url);
    } else {
        return true;
    }
}

function checkUCBio(bio) {
    if (bio.length < 10) {
        return false;
    } else {
        return true;
    }
}

function checkUCSynopsis(synopsis) {
    if (synopsis.length < 10) {
        return false;
    } else {
        return true;
    }
}

function checkTextAreaLimit(element, limit, remaining_element) {
    if (element.value.length > limit) {
        element.value = element.value.substring(0,400);
    }
    if ((400 - element.value.length) == 0) {
        remaining_element.innerHTML = '<span style="color: red;">0</span>'; 
    } else {
        remaining_element.innerHTML = (400 - element.value.length).toString();
    }
}

function areThereQueuedFiles() {
    var x=0;
    var counter=0;
    for (x=0; x<10; x++) {
        if (document.getElementById('user_contest_file_'+x.toString()).value.length > 4) {
            counter++;
        }
    }

    if (counter > 0) {
        return true;
    } else {
        alert("Unable to submit your entry.  You have not added any files to be submitted. Please ensure that at least one or more file(s) in .jpg, .gif or .png format have been selected for uploading then press the submit button.");
        return false;
    }
}

function isUCFormOkayToSubmit() {
    var name = document.getElementById('id_name');
    var address = document.getElementById('id_address');
    var city = document.getElementById('id_city');
    var state = document.getElementById('id_state');
    var postal = document.getElementById('id_postal');
    var age = document.getElementById('id_age');
    var email = document.getElementById('id_email');
    var url = document.getElementById('id_url');
    var bio = document.getElementById('id_bio');
    var synopsis = document.getElementById('id_synopsis');
    var category = document.getElementById('id_category');
    
    if (checkUCEmail(email) && checkUCUrl(url) && checkUCName(name) && checkUCAddress(address) && checkUCCity(city) && checkUCState(state) && checkUCPostal(postal) && checkUCAge(age) && checkUCBio(bio) && checkUCSynopsis(synopsis) && checkUCCategory(category)) {
        document.getElementById('id_url').value = '';
        return areThereQueuedFiles();
    } else {
        alert("Unable to submit your entry.  Please make sure that all required fields are filled out correctly, that a category has been selected and that any URL (if provided) is valid and starts with 'http://'");
    }
    return false;
}