Code not working in IE

Thanks for the quick reply
actually i have implemented the two functions
function StartEvents()
{
      if(document.captureEvents)
      {
            
            if(Event.KEYUP && document.onkeyup == null)
            {
                  document.captureEvents(Event.KEYUP);
                  document.onkeyup=backhome;
            }

      }
}

function StopEvents()
{
      
      if(document.releaseEvents)
      {
            if(Event.KEYUP)
            {
                  document.releaseEvents(Event.KEYUP);
                  document.onkeyup = null;
                  document.onkeydown = null;
            }

      }
}

On a certain click i want the above events to be stopped (StopEvents() )and on  another click i want them to be enabled (StartEvents()  )

I hope i m clear now with my problem

You could take a look at prototype.js (http://prototypejs.org).

This has cross browser support for ...

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  DOMEvents: ['click', 'dblclick', 'mousedown', 'mouseup', 'mouseover',
              'mousemove', 'mouseout', 'keypress', 'keydown', 'keyup',
              'load', 'unload', 'abort', 'error', 'resize', 'scroll',
              'select', 'change', 'submit', 'reset', 'focus', 'blur'],
...

Why not look at the onkeydowm event handler? Check out this link:

Take a look here: http://www.devguru.com/features/knowledge_base/A100231.html

thanks for the answers
But i m looking to get this piece of code to be functional in Internet Explorer

  if(document.releaseEvents)
      {
            if(Event.KEYUP)
            {
                  document.releaseEvents(Event.KEYUP);
                  document.onkeyup = null;
                  document.onkeydown = null;
            }

      }

The above code works fine in FireFox

@lrygiel
The link which u have provided me i have already implemented that stuff

@RQuadling
Sorry but i m not using any frame works

hey guys thanks for the help but i got the solution which is as follows

function StartEvents()
{
      if( document.onkeyup )
      {
            document.onkeyup = null;
            document.onkeydown = null;
      }      
      if( document.captureEvents && Event.KEYUP )
      {
            document.captureEvents( Event.KEYUP );
      }
      document.onkeyup = backhome;
      return false;
}

function StopEvents()
{
      if(document.releaseEvents)
      {
            document.releaseEvents(Event.KEYUP);
      }
      if( document.onkeyup )
      {
            document.onkeyup = null;
            document.onkeydown = null;
            return false;
      }      
}