var ns4 = (document.layers) ? true:false 
var ie4 = (document.all) ? true:false 
var ng5 = (document.getElementById) ? true:false 

function hidepage() { 
	var n = 4;
	var d = 'page';
    for (var i = 1; i<=4; i++){
        if (ng5) document.getElementById(d+i).style.visibility = "hidden";
        else if (ns4) document.layers[d+i].visibility = "hide"; 
        else if (ie4) document.all[d+i].style.visibility = "hidden"; 
    }
}

function showpage(n) { 
	hidepage(); 
	if (ng5) document.getElementById('page' + n).style.visibility = "visible"; 
	else if (ns4) document.layers["page" + n].visibility = "show"; 
	else if (ie4) document.all["page" + n].style.visibility = "visible"; 
}

function hideportfolio() { 
    var n = 14;
    var d = 'portfolio';
    for (var i = 1; i<=14; i++){
        if (ng5) document.getElementById(d+i).style.visibility = "hidden";
        else if (ns4) document.layers[d+i].visibility = "hide"; 
        else if (ie4) document.all[d+i].style.visibility = "hidden"; 
    }
}

function showportfolio(n) { 
	hideportfolio(); 
	if (ng5) document.getElementById('portfolio' + n).style.visibility = "visible"; 
	else if (ns4) document.layers["portfolio" + n].visibility = "show"; 
	else if (ie4) document.all["portfolio" + n].style.visibility = "visible"; 
}

function hidephotoset() { 
    var n = 6;
    var d = 'photoset';
    for (var i = 1; i<=6; i++){
        if (ng5) document.getElementById(d+i).style.visibility = "hidden";
        else if (ns4) document.layers[d+i].visibility = "hide"; 
        else if (ie4) document.all[d+i].style.visibility = "hidden"; 
    }
}

function showphotoset(n) { 
	hidephotoset(); 
	if (ng5) document.getElementById('photoset' + n).style.visibility = "visible"; 
	else if (ns4) document.layers["photoset" + n].visibility = "show"; 
	else if (ie4) document.all["photoset" + n].style.visibility = "visible"; 
}