// This function enables or disables the dropdown menus in the first section depending on whether the event type is checked.
function toggle_event_type() {
	chosen = '';
	len = document.tent_chooser.event_type.length;
	for (i = 0; i < len; i++) {
		var chosen = document.tent_chooser.event_type[i].value;
		var which = document.getElementById(chosen + '_hidden');
		if (which) {
			which.disabled = document.tent_chooser.event_type[i].checked ? false : true;
		}
	}
}

// This loads the event date calendar in the first section.

function WindowLoad() {
	var chooser = document.getElementById('calendar');
	chooser.DateChooser = new DateChooser();
	chooser.DateChooser.setUpdateField({'monthselect':'n', 'dayselect':'j', 'yearselect':'Y'});
	chooser.DateChooser.setIcon('tent-size-tool/datechooser.png', 'yearselect');
	toggle_event_type();
	return true;
}