var wns4 = (document.layers)? true:false
	var wns6 = (document.getElementsByName)? true:false
	var wie4 = (document.all)? true:false
	
	var iTimeout = 100;
	var arTimeouts = new Array;
	for(iCycle = 0; iCycle < 7; ++ iCycle)
		arTimeouts[iCycle] = 0;

    var selectedImage;
    
function on(image, show) {
    if (image == null) 
        image = selectedImage;
    var l = image.src.length;
    var i = image.src.indexOf(".",l-4);            
    if (show) {
        selectedImage = image;
        image.src = image.src.substring(0,i) + "_a." + image.src.substring(i+1,l);
    } else {
        image.src = image.src.substring(0,i-2) + "." + image.src.substring(i+1,l);
    }     
}


function showDiv(wdivNumber)
{
	var wdivShow = 'area_' + wdivNumber;
	var el;
	if (wns6)
			if ((el = document.getElementById(wdivShow)) != null)
			  el.style.visibility = 'visible';
	if (wie4)
	    if ((el = document.all(wdivShow))!=null)
			el.style.visibility = 'visible';
	if (wns4)
	    if ((el = document.layers[wdivShow]) != null)
			el.visibility = 'show';
}

function hideDiv(wdivNumber)
{
	if (wns6)
		arTimeouts[wdivNumber] = setTimeout("document.getElementById('area_" + wdivNumber + "').style.visibility = 'hidden'", iTimeout);
	else if(wie4)
		arTimeouts[wdivNumber] = setTimeout("document.all('area_" + wdivNumber + "').style.visibility = 'hidden'", iTimeout);
	else if(wns4)
		arTimeouts[wdivNumber] = setTimeout("document.layers['area_" + wdivNumber + "'].visibility = 'hide'", iTimeout);
}

function keepDiv(wdivNumber)
{
	clearTimeout(arTimeouts[wdivNumber]);
}

var wver = parseFloat (navigator.appVersion);
if ((navigator.appName.indexOf ("Netscape") == 0) && (wver >= 4)) {
} else if ((navigator.appName.indexOf ("Mozilla") == 0) && (wver >= 5)) {
} else if ((navigator.appName.indexOf ("Microsoft") == 0) && (wver >= 4)) {
} else if ((navigator.appName.indexOf ("Opera") == 0) && (wver >= 7.2)) {
} else {
	location="oldbrowser.html";
}

function show_photo(url, window_width, window_height) {
    var window_left = (screen.availWidth / 2) - (window_width / 2)
    var window_top = (screen.availHeight / 2) - (window_height /2)
    var window_dimensions = "height=" + window_height +
                            ",width=" + window_width +
                            ",left=" + window_left +
                            ",top=" + window_top +
                            ",toolbar=0,menubar=0,statusbar=0,scrollbars=no"
    window.open(url, "image", window_dimensions)
 }