var isNav4, isIE4;

if (parseInt(navigator.appVersion.charAt(0)) >= 4) 
	{
	isNav4 = (navigator.appName == "Netscape") ? true : false;
        isIE4 = (navigator.appName.indexOf("Microsoft") != -1) ? true : false;
        }
                                                
function xpand(divName, btnName, imgDirection)
{
if(isNav4)
	{
		if(divName.visibility == "inherit")
			{
			divName.visibility = "hidden";
			}
		else
			{
	        	document.layers.advanced.visibility = "hidden";
			}
	} 
else
	{
	if(divName.style.display == "")
		{
			if (imgDirection == "imgleft")
				{
			btnName.src = "images/arrow-closed.gif"
				}
			else
				{
				btnName.src = "images/arrow-closed-right.gif"
                		}
	
		divName.style.display = "none";
        	}
        else
		{
			btnName.src = "images/arrow-open.gif"
			divName.style.display = "";
		}
	}
}