[Analogpoint]

To begin with, hcur isn't defined in the function. I didn't get any further than that. But why make it that complicated? Put your two alternate headers within a div for each one, and then do something like this. Your two divs have id's headerone and headertwo.

function toggle_header()
{
      var el = document.getElementById('headerone');
      if (el.style.display == 'none')
      {
              el.style.display = '';
              document.getElementById('headertwo').style.display = 'none';
      }
      else
      {
              el.style.display = 'none';
              document.getElementById('headertwo').style.display = '';
      }
}