//function to display or hide a given element
 function showHideItems(myItem, myButton){

 //this is the ID of the hidden item
 var myItem = document.getElementById(myItem);

 //this is the ID of the plus/minus button image
 var myButton = document.getElementById(myButton);
		 if (myItem.style.display != "none") {
				 //items are currently displayed, so hide them
				 myItem.style.display = "none";
				 swapImage(myButton,"plus");
		 }
		 else {
				 //items are currently hidden, so display them
				 myItem.style.display = "block";
				 swapImage(myButton,"minus");
		 }
 }

 //function to swap an image based on its current state
 function swapImage(myImage, state) {
		 if (state == "minus") {
				 myImage.src = "../images/templateimages/icoMinus.gif";
		 }
		 else {
				 myImage.src = "../images/templateimages/icoPlus.gif";
 }
 }