how to disable the page if we select any icon(or)button

hi

I used menu item in my program(sap.m.commons.menu).this is my program

<u:Menu width="400px" class="menutext" id="vsdFilterBar"

  itemSelect="handleMenuItemPress">

  <u:MenuItem id="vsdFilterLabel"

  text="Ascending" key="name"  select = "Ascending" />

  <u:MenuItem

  text="Descending" key="name"  select = "Descending" />

  <u:MenuItem

  text="Group by" select="onNavToProduct">

  </u:MenuItem>

  </u:Menu>

if i select button menu is displayed.At time i want to put main page in disabled mode.is there any way to put page in disable mode.plz give any example.

Thank u

Nandini