function toggle(targetId){
  if (document.getElementById){
  	var element = document.getElementById(targetId);
  	if (element.style.display == "none"){
  		show(element);
  	} 
  	else{
  		hide(element);
  	}
  }
}

function doAll(targetIdPrefix, instruction){
	var elements = document.getElementsByTagName("div");
	
	for (var i=0; i<elements.length; i++){		
		if (elements[i] != null && elements[i].id.indexOf(targetIdPrefix) == 0){
			//alert(elements[i].id);			
			
			if (instruction == "show"){
				show(elements[i]);
			}
			else{
				hide(elements[i]);
			}
		}
	}
}

function show(element){
	element.style.display = "";
}
function hide(element){
	element.style.display = "none";
}