var showDiv;
function showAbstract( el ){
	if(showDiv == null){
		showDiv = document.getElementById(el);
		showDiv.style.display = "block";		
	} else {
		showDiv.style.display = "none";
		showDiv = null;
	}
}

function emailFriend(){ /* initialises function show Abstract */
	showAbstract('FriendForm');
}


			function show(object) {
			  if (document.getElementById) {
			    document.getElementById(object).style.display = 'block';
			  }
			  else if (document.layers && document.layers[object]) {
			    document.layers[object].display = 'block';
			  }
			  else if (document.all) {
			    document.all[object].style.display = 'block';
			  }
			}
			
			function hide(object) {
			  if (document.getElementById) {
			    document.getElementById(object).style.display = 'none';
			  }
			  else if (document.layers && document.layers[object]) {
			    document.layers[object].display = 'hidden';
			  }
			  else if (document.all) {
			    document.all[object].style.display = 'none';
			  }
			}