function toggleDown(nm) {
// written by Daniel P 3/21/07
// toggle checkboxes down a whole column
	var lastskuindex = document.getElementById('lastindex');
	for ( i=0; i<=lastskuindex.value; i++ ) {
		if (document.getElementById(nm+i).checked) {	// this one is currently checked
			document.getElementById(nm+i).checked = false;
		} else {
			document.getElementById(nm+i).checked = true;
		}
	}	// looping down the rows
}

Toggle specific row of checkboxes

form

JavaScript