IE4 = (document.all) ? 1 : 0
NS4 = (document.layers) ? 1 : 0
NS6 = (document.getElementById) ? 1 : 0

// Rollover JavaScript functions relies on image replacement feature of JavaScript 1.1

function version() 
{
	var vs = navigator.appVersion;
	var ndx = navigator.appVersion.lastIndexOf('(');
	if (ndx>=0) vs = vs.substring(0,ndx);
	return parseFloat(vs);
}

var iversion = version();

function rollon(imgName,imgFile,imgStatus) 
{
	if (3 <= iversion && imgName!='') {
        document[imgName].src = getBaseUrl(document[imgName].src)+imgFile+".gif";
        window.status=imgStatus;
    }
}

function rolloff(imgName,imgFile) 
{
	if (3 <= iversion && imgName!='') {
        document[imgName].src = getBaseUrl(document[imgName].src)+imgFile+".gif";
        window.status=defaultStatus;
    }
}

function getBaseUrl(imgSrc) 
{
	var ndx = imgSrc.lastIndexOf('/');
	if (ndx>=0) return imgSrc.substring(0,ndx+1);
	else return '';
}