function setVisibility(objectID,state) {
	var dom = findDOM(objectID,1);
	dom.visibility = state;
}

function toggleVisiblity(objectID) {
	var dom = findDOM(objectID,1);
	state = dom.visibility;
	if (state == 'hidden' || state =='hide') {
		dom.visibility = 'visible';
		dom.display = 'block';
	}
	else {
		if (state == 'visible' || state == 'show') {
			dom.visibility = 'hidden';
			dom.display = 'none';
		}
		else {
			dom.visibility = 'visible';
			dom.display = 'block';
		}	
	}
}

function allHidden(objectList) {
 //set all layers in list to hidden
 layerArray = objectList.split(",");
 for(i=0;i<layerArray.length;i++) {
  var dom = findDOM(layerArray[i],1);
  dom.visibility = 'hidden';
 }
}