var imageFolder = document.body.className + "IMG/Menu/";
function toggleVisibility(pId) {
	var lPlusMinus = document.getElementById("plusMinus_" + pId);
	var lSubMenu = document.getElementById("subMenu_" + pId);
	if (lPlusMinus.accessKey == "+") {
		lPlusMinus.firstChild.src = imageFolder + "minus.gif";
		lSubMenu.className = "shown";
		lPlusMinus.accessKey = "-";
	}
	else {
		lPlusMinus.firstChild.src = imageFolder + "plus.gif";
		lSubMenu.className = "hidden";
		lPlusMinus.accessKey = "+";
	}
}