function add_commas(str) {
    str += '';
    x = str.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
            x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }
    return x1 + x2;
}

function country_changed(country) {
    document.getElementById('state_prov_us').style.display = 'none';
    document.getElementById('state_prov_ca').style.display = 'none';
    document.getElementById('state_prov_mx').style.display = 'none';
    document.getElementById('state_prov_af').style.display = 'none';
    document.getElementById('state_prov_us').name = '';
    document.getElementById('state_prov_ca').name = '';
    document.getElementById('state_prov_mx').name = '';
    document.getElementById('state_prov_af').name = '';
    document.getElementById('state_prov_holder').style.display = 'none';
    document.getElementById('zipcode_holder').style.display = 'none';

    if (country == 'US') 
        document.getElementById('zipcode_holder').style.display = '';
        
    if (document.getElementById('state_prov_'+country.toLowerCase()) != null) {
        document.getElementById('state_prov_holder').style.display = '';
        document.getElementById('state_prov_'+country.toLowerCase()).style.display = '';
        document.getElementById('state_prov_'+country.toLowerCase()).name = 'state_prov';
    }
}

function toint(subject) {
    var pre = '';
    if (subject.substr(0,1) == '-')
        pre = '-';
    return pre+subject.replace(/[^0-9\.]+/g, '');
}

function tourl(subject) {
    return subject.replace(/[^0-9A-Za-z\_]+/g, '');
}

function enable_radius(length) {
    if (length == 5) {
            document.getElementById('radius').disabled = '';
    }else{
            document.getElementById('radius').disabled = 'disabled';
    }
}

function focusNextBox(id, num) {
    if (document.getElementById(id+num).value.length == document.getElementById(id+num).maxLength) {
            if (document.getElementById(id+(num+1)) != null) {
                    document.getElementById(id+(num+1)).focus();
            }
    }
}