function show_element(element)
{

	  if (document.getElementById(element).style.display == 'block')
      {
            document.getElementById(element).style.display = 'none';
			return true;
      }
	  
	  else  (document.getElementById(element).style.display == 'none')
      {
            document.getElementById(element).style.display = 'block';
			return false;
      }
}