<!--
    //  Browser type and DOM reference methods
    var isIE = 0;
    var isNav = 0;
    var isMac = 0;
    var isGecko = 0;
    var layerRef="", styleSwitch=""; leftBracket=""; rightBracket="";

    //  Determine our browser capabilities
    if (document.layers) {
        layerRef = 'document.layers';
        styleSwitch = '';
	leftBracket = '[';
	rightBracket = ']';
	isNav = 1;
	//alert("Netscape!");
    }
    else if( document.all) {
	layerRef = 'document.all';
        styleSwitch = '.style';
	leftBracket = '[';
	rightBracket = ']';
	isIE = 1;
	//alert("IE!");
    }
    else if ( document.getElementById ){
	layerRef = 'document.getElementById';
        styleSwitch = '.style';
	leftBracket = '(';
	rightBracket = ')';
	isGecko = 1;
	//alert("Netscape 6!");
    }

    //  Are we running on a Mac?
    if (navigator.platform.indexOf("Mac") != -1){
	isMac = 1;
    }

    //  Change layer visibility
    function hideLayer(layerID){
	var layerName = layerRef + leftBracket + '"' + layerID + '"' + rightBracket;
	if (eval(layerName))
	    eval(layerName + styleSwitch + '.visibility="hidden"');
    }

    function showLayer(layerID){
	var layerName = layerRef + leftBracket + '"' + layerID + '"' + rightBracket;
	if (eval(layerName))
	    eval(layerName + styleSwitch + '.visibility="visible"');
    }
//-->