openImg = "index.php/module/wrapper/getImage/open.gif/checktheme/true";
closedImg = "index.php/module/wrapper/getImage/closed.gif/checktheme/true";

function showBranch(branch) {	
	var objBranch = document.getElementById(branch).style;
	if(objBranch.display=="block") {
		objBranch.display="none";
	} else {
		objBranch.display="block";
	}
	saveNaviState(branch,objBranch.display);
	swapFolder('I' + branch);
}

function swapFolder(img) {
	objImg = document.getElementById(img);
	if(objImg.src.indexOf('index.php/module/wrapper/getImage/closed.gif/checktheme/true')>-1) {
		objImg.src = openImg;
	} else {
		objImg.src = closedImg;
	}
	return(true);
}