var isDHTML=0;
var isID=0;
var isAll=0;
var isLayers=0;

var plus_image = new Image();
var minus_image = new Image();

plus_image.src = "images/icon_expand.gif";
minus_image.src = "images/icon_collapse.gif";
				
if (document.getElementById) {
	isID = 1; 
	isDHTML = 1;
	}
	
else {
	if (document.all) {
		isAll = 1; 
		isDHTML = 1;
		}
	
	else {
		browserVersion=parseInt(navigator.appVersion);
		}
	
	if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion==4)) {
		isLayers=1; isDHTML=1;
		}
	}

function toggleIt(name) {
	if (isID) {	
		var x = document.getElementById(name).style; 
		}
	else { 
		if (isAll) { 
			var x = document.all[name].style; 
			} 
		else { 
			if (isLayers) { 
				var x = document.layers[name].style ; 
				}
			}
		}
	
	//alert(name);
	if (x.display == 'block') {
		x.display = 'none';
		document.images[name + '_img'].src = 'images/icon_expand.gif';
		} 
	else {
		x.display = 'block';
		document.images[name + '_img'].src = 'images/icon_collapse.gif';
		}
	}