//function to show hide 
function showHide(el, myButton, showonly) {
     var elObj = document.getElementById(el);
     var myButton = document.getElementById(myButton);
	 if(elObj.style.display == "none")
          {
               elObj.style.display = "";
			   swapImage(myButton,"minus");
          }
               else
          {
     if(!showonly)
          {
               elObj.style.display = "none";
			   swapImage(myButton,"plus");
          }
     }}


//function to swap an image based on its current state
function swapImage(myImage, state) {

	if (state == "minus") {
	myImage.src = "../images/arrow_down_small.gif";
	}
	else {
	myImage.src = "../images/arrow_right_small.gif";
	}
	}