var toggle = new Array("chkNum", "chkName", "chkMass");

function init() {
	document.getElementById('word').value = document.getElementById('post').innerHTML;
	document.getElementById('word').select();
	checkboxes();
}

function checkboxes() {
	var checked = !document.getElementById('chkImg').checked;
	for(var i in toggle) {
		document.getElementById(toggle[i]).disabled = checked;
	}
}