Sinse 2.5 dhtmlxMenu version some functionality moved to extended menu package (dhtmlxmenu_ext.js file needed). If you use it without included dhtmlxmenu_ext.js file, you'll see an alert “dhtmlxmenu_ext.js required”.

List of extended functionality:

• setItemEnabled
• setItemDisabled
• isItemEnabled
• getItemText
• setItemText
• loadFromHTML
• hideItem
• showItem
• isItemHidden
• setUserData
• getUserData
• setOpenMode
• setWebModeTimeout
• enableDynamicLoading
• getItemImage
• setItemImage
• clearItemImage
• setAutoShowMode
• setAutoHideMode
• setContextMenuHideAllMode
• getContextMenuHideAllMode
• setVisibleArea
• setTooltip
• getTooltip
• setHotKey
• getHotKey
• setItemSelected
• setTopText
• setRTL
• setAlign
• setHref
• clearHref
• setOverflowHeight
• getRadioChecked
• setRadioChecked
• addRadioButton
• setCheckboxState
• getCheckboxState
• addCheckbox