function issue(prefix, show) {
	var div = document.getElementById('issue_sub_'+prefix);
	if (show) {
		div.style.display = 'block';
		stop = 1;
	} else {
		div.style.display = 'none';
		stop = 0;
	}
}

var position = 0;
var stop = 0;
var issues = new Array();
issues[0] = 'lhl';
issues[1] = 'lhd';
issues[2] = 'thl';

function rotate(force, direction) {
	if (!stop || force) {
		//hide the old one
		document.getElementById('issue_'+issues[position]).style.display = 'none';
		
		//show the new one
		if (direction == 'backward') {
			if (position == 0) {
				position = issues.length - 1;
			} else {
				position--;
			}
		} else {
			if (position >= issues.length - 1) {
				position = 0;
			} else {
				position++;
			}
		}
		document.getElementById('issue_'+issues[position]).style.display = 'block';
	}
}

function issue_action(action) {
	if (action == 'play') {
		stop = 0;
	} else if (action == 'pause') {
		stop = 1;
	} else {
		stop = 1;
		if (action == 'forward') {
			rotate(1, 'forward');
		} else {
			rotate(1, 'backward');
		}
	}
}

function restore(obj, value) {
	if (obj.value == "") {
		obj.value = value;
	}
}

function erase(obj, value) {
	if (obj.value == value) {
		obj.value = '';
	}
}