// BOUNDS CHECK SCRIPT
// FROM O'REILY'S JAVASCTIPT THE DEFINITIVE GUIDE 3RD EDITION
function isblank(s)
{
    for(var i = 0; i < s.length; i++) {
        var c = s.charAt(i);
        if ((c != ' ') && (c !='\n') && (c != '\t')) return false;
    }
    return true;
}

function verify(f)
{
    var msg
    var empty_fields = "";
    var errors = "";
    for(var i = 0; i < f.length; i++) {
        var e = f.elements[i];
        if (((e.type == "text") || (e.type == "textarea")) && !e.optional) {
            if ((e.value == null) || (e.value == "") || isblank(e.value)) {
                empty_fields += "\n          " + e.name;
                continue;
            }

        if (e.numeric || (e.min != null) || (e.max != null)) {
            var v = parseFloat(e.value);
            if (isNaN(v) ||
                ((e.min != null) && (v < e.min)) ||
                ((e.max != null) && (v > e.max))) {
                errors += "- The field " + e.name + " must be a number";
                if (e.min != null)
                    errors += " that is at least " + e.min;
                if (e.max != null && e.min != null)
                    errors += " and at most " + e.max;
                else if (e.max != null)
                    errors += " that is at most " + e.max;
                errors += ".\n" ;
            }
        }
    }
}

if (!empty_fields && !errors) return true;

msg = "------------------------------------------------------\n\n"
msg += "The form was not submitted because of the following error(s).\n";
msg += "Please correct these error(s) and re-submit.\n";
msg += "------------------------------------------------------\n\n";

if (empty_fields) {
    msg += "- The following required field(s) are empty:"
            + empty_fields + "\n";
    if (errors) msg += "\n";
    }
    msg += errors;
   alert(msg);
    return false;
}