function toggleDisplay(target) {
  
      longTarget = document.getElementById(target).style.display;
	  imgtarget = target + '_IMG';
	  if (longTarget == 'inline') {
	    document.getElementById(target).style.display = 'none' 
		document.getElementById(imgtarget).src = 'images/expand.png'; }
	  else if (longTarget == 'none') {
	    document.getElementById(target).style.display = 'inline'
		document.getElementById(imgtarget).src = 'images/collapse.png'; ;
	  }
     
	 
	  
  }