function getElement(psID){
	if(document.all){
		return document.all[psID];
	}else if(document.getElementById){
		return document.getElementById(psID);
	}else{
		for (iLayer = 1; iLayer < document.layers.length; iLayer++) { 
			if(document.layers[iLayer].id == psID){
				return document.layers[iLayer];
			}
		}
	} 
	return Null; 
} 
function setDivVisibility(id, visible){
	var Div = getElement(id);
	if(visible){
		Div.style.display = 'block';
	}else{
		Div.style.display = 'none';
	}
}
function invertVisibility(id){
	var Div = getElement(id);
	if(Div.style.display == 'none'){
		return true;
	}else{
		return false;
	}
}