function getLayerById(id)
{
    for (i = 0; i < document.layers.length; ++i)
        if (document.layers[i].id && id == document.layers[i].id) {
            return document.layers[i];
        }
        return null;
}


if (!document.getElementById && document.all) 
    document.getElementById = new Function("id", "return document.all[id];");
else if (document.layers)
    document.getElementById = getLayerById;


function displayLayer()
{
    args=displayLayer.arguments;
    for (i=0; i<(args.length-1); i+=2)
        if ((layer=document.getElementById(args[i]))!=null) {
	    v=args[i+1];
	    v=(v=='show')?'visible':(v='hide')?'hidden':v;
	    if (layer.style) layer=layer.style;
		layer.visibility=v;
	}
}