function ToggleLayer (LayerName, Show) {
	if(document.layers)	   //NN4+
    {
       document.layers[LayerName].visibility = Show ? "show" : "hide";
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(LayerName);
        obj.style.visibility = Show ? "visible" : "hidden";
    }
    else if(document.all)	// IE 4
    {
        document.all[LayerName].style.visibility = Show ? "visible" : "hidden";
    }
}