function go() {

    if (document.forms[0].enterZip.value.length == 0) {
        alert('Error, please enter ZIP.');
        return false;
    }
    
    if (document.forms[0].chooseType) {
        var ddl = document.forms[0].chooseType;
        switch ( ddl.selectedIndex ) {
            case 0: alert('Error, please select an insurance type!');  return false;
           /* case 1: window.location = 'auto-quote.html?zip=' + document.forms[0].enterZip.value; break;
            case 2: window.location = 'home-quote.html?zip=' + document.forms[0].enterZip.value; break;
            case 3: window.location = 'health-quote.html?zip=' + document.forms[0].enterZip.value; break;
            case 4: window.location = 'life-quote.html?zip=' + document.forms[0].enterZip.value; break;*/
        }

        return true;
    }
}