function checkAll(value) {
    // Get object count in this form.
    var objCount = document.forms[0].elements.length;

    // Check object type.
    for (i = 0; i < objCount; i++) {
        if (document.forms[0].elements[i].type == 'checkbox') {
            document.forms[0].elements[i].checked = value;
        }
    }
}
function checkMyList(prefix, value) {
    // Get object count in this form.
    var objCount = document.forms[0].elements.length;

    var elementName = null;

    // Check object type.
    for (i = 0; i < objCount; i++) {
        if (document.forms[0].elements[i].type == 'checkbox') {
            elementName = document.forms[0].elements[i].name;
            if (elementName.length >= prefix.length
				&& prefix == elementName.substr(0, prefix.length)) {
                document.forms[0].elements[i].checked = value;
            }
        }
    }
}