function show(id) {
	var x = eval('document.getElementById("'+id+'")');
	x.style.visibility = "visible";	
}

function hide(id) {
	var x = eval('document.getElementById("'+id+'")');
	x.style.visibility = "hidden";	
}

function toggle(trigger, target) {
	var el = eval('document.getElementById("'+target+'")');
	var el2 = eval('document.getElementById("'+ trigger + '")');
	el.disabled = !(el2.checked);
}