function setNavigazioneBehavior()
{
  var zoomLayoutTag = document.getElementById("ZoomLayout");
  var noCSSLayoutTag = document.getElementById("TextOnly");
  var defaultSkinTag = document.getElementById("DefaultLayout");  
  zoomLayoutTag.cssName = 'ZoomSkin';
  defaultSkinTag.cssName = 'DefaultSkin';
  noCSSLayoutTag.cssName = 'TextOnly';
  noCSSLayoutTag.onmousedown = defaultSkinTag.onmousedown = zoomLayoutTag.onmousedown = setActiveCSS;
  //noCSSLayoutTag.onmousedown = disableCSS;
}
  //zoomLayoutTag.onkeypress = setActiveCSS; defaultSkinTag.onkeypress = setActiveCSS;