function toggle(region) {
	toggleImage(region);
	toggleCheckBox(region);
}

function toggleCheckBox(region) {
	cb = document.getElementById('srch_reg_' + region);
	if (cb.checked == true) {var cbToggle = false} else {cbToggle = true};
	document.getElementById('srch_reg_' + region).checked = cbToggle;
}

function toggleImage(region){
	togImg = (document.getElementById('map' + region).style.visibility == 'visible') ? 'hidden' : 'visible';
	document.getElementById('map' + region).style.visibility = togImg;
}

function showRegion(region){  //rollovers only
	document.getElementById("map").src = "/images/pldb/map/map" + region.id + ".gif";
}

function hideRegion(){  //rollovers only
	document.getElementById("map").src = "/images/pldb/map/map.gif";
}