function showHideItems(myItem, myButton){

var myItem = document.getElementById(myItem);

var myButton = document.getElementById(myButton);

if (myItem.style.display != "none") {
	myItem.style.display = "none";
	swapImage(myButton,"plus");
}
else {

	myItem.style.display = "block";
	swapImage(myButton,"minus");
}
}
function swapImage(myImage, state) {
	if (state == "minus") {
	myImage.src = "images/minus.gif";
}
else {
	myImage.src = "images/more.gif";
}
}