// xShow, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xShow(e) {return xVisibility(e,1);}



// xHide, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xHide(e){return xVisibility(e,0);}



// xVisibility, Copyright 2003-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xVisibility(e, bShow)
{
  if(!(e=xGetElementById(e))) return null;
  if(e.style && xDef(e.style.visibility)) {
    if (xDef(bShow)) e.style.visibility = bShow ? 'visible' : 'hidden';
    return e.style.visibility;
  }
  return null;
}




// xDef, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xDef()
{
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])=='undefined') return false;}
  return true;
}



// xGetElementById, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xGetElementById(e)
{
  if(typeof(e)=='string') {
    if(document.getElementById) e=document.getElementById(e);
    else if(document.all) e=document.all[e];
    else e=null;
  }
  return e;
}