// show hide 

function toggler(btn, element, text) {
	if (text == undefined) text = 'Show';
	box = document.getElementById(element);
	if (box == undefined) alert('Element not found.');
	if (box.style.display == 'none') {
		box.style.display = 'block';
		btn.innerHTML = 'Hide';
	} else {
		box.style.display = 'none';
		btn.innerHTML = text;
	}
	return false;
}