function checkAll(element, name) {
	var form = element.form;
	var i = 0;
	for (i = 0; form[i] != null; i++) {
		if (form[i].type == 'checkbox' && form[i].name == name)
			form[i].checked = element.checked;
	}
}

function clearCheck(element, name) {
	var form = element.form;
	var i = 0;
	for (i = 0; form[i] != null; i++) {
		if (form[i].type == 'checkbox' && form[i].name == name)
			form[i].checked = false;
	}
}