// Function to show/hide articles

var last_expanded = 'article1'; 

function showHide(id) { 
	var obj = document.getElementById(id); 

	var status = obj.className; 

	if (status == 'hide') { 

		if (last_expanded != '') { 
			var last_obj = document.getElementById(last_expanded); 
			last_obj.className = 'hide'; 
		} 

		obj.className = 'show'; 
		last_expanded = id; 
	}
	
}