function toggleMenu3(elementID) {
  var srcElement, menuItemID;
  srcElement = document.getElementById(elementID);
  
	if(elementID != null) {
		var srcItem = srcElement.parentNode;
		while(srcItem.tagName.toLowerCase() != "tr") 
			srcItem = srcItem.parentNode;
		/* Open menu event */
		if(srcItem.style.display == "none") 
			srcItem.style.display = "";
		
		/* Close menu event */
		else 
			srcItem.style.display = "none";
	}
}