/*
var dom = document.getElementById ? true : false;
var nn4 = document.layers ? true : false;
var ie4 = document.all ? true : false;


if (ie4) {
	var layerRef = document.all[layerName].style;
} else if (nn4) {
	var layerRef = document[layerName];
} else if (dom) {
	var layerRef = document.getElementById(layerName).style;
}
*/

function getLayerRefShowHideLayer(layerName) {
	var layerRef = (document.getElementById) ? document.getElementById(layerName).style : (document.all) ? document.all[layerName].style : (document.layers) ? document[layerName] : 0;
	return layerRef;
}


function showLayer(layerName) {
	getLayerRefShowHideLayer(layerName).visibility = "visible";
}


function hideLayer(layerName) {
	getLayerRefShowHideLayer(layerName).visibility = "hidden";
}


function openPhotoAlbum(file) {
	var winParameter = "width=600,height=380,menubar=0,resizable=1,scrollbars=1,status=0,titlebar=1,toolbar=0,left=10,top=10";
	var pictureWindow = window.open(file,"pictureWindow",winParameter);
	pictureWindow.focus();
}

function swapImage(layerName, imgName, objName) {
	if ((document.layers) && (layerName != null)) {
		eval('document.' + layerName + '.document.images["' + imgName + '"].src = ' + objName + '.src');
	} else {
		document.images[imgName].src = eval(objName + ".src");
	}
}

function preloadImage(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()');
		eval(imgObj+'.src = "'+imgSrc+'"');
 	}
}