// JavaScript Document

function showCodeGroup(n) {
	
	// hide all open code groups
	
	var current = 0;
	
	for (x=1;x<=5;x++) {
		
		
		if (document.getElementById('ecode_'+x).style.display == 'block') current = x;
		
		document.getElementById('ecode_'+x).style.display='none';
		document.getElementById('code_trigger_'+x).style.backgroundImage='url(/images/enh_plus_back.gif)';
		
		}
		
	var state = (current == n) ? 'none' : 'block';
	var bg_image = (current == n) ? 'url(/images/enh_plus_back.gif)' : 'url(/images/enh_minus_back.gif)';
	
	document.getElementById('ecode_'+n).style.display=state;
	document.getElementById('code_trigger_'+n).style.backgroundImage=bg_image;
		
	}