morning_home_practice

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/*************************************************************************
This code is from Dynamic Web Coding at http://www.dyn-web.com/
Copyright 2001-3 by Sharon Paine
See Terms of Use at http://www.dyn-web.com/bus/terms.html
regarding conditions under which you may use this code.
This notice must be retained in the code as is!
*************************************************************************/

// resize fix for ns4
var origWidth, origHeight;
if (document.layers) {
origWidth = window.innerWidth; origHeight = window.innerHeight;
window.onresize = function() { if (window.innerWidth != origWidth || window.innerHeight != origHeight) history.go(0); }
}

var cur_lyr;// holds id of currently visible layer
function swapLayers(id) {
if (cur_lyr) hideLayer(cur_lyr);
showLayer(id);
cur_lyr = id;
}

function showLayer(id) {
var lyr = getElemRefs(id);
if (lyr && lyr.css) lyr.css.visibility = "visible";
}

function hideLayer(id) {
var lyr = getElemRefs(id);
if (lyr && lyr.css) lyr.css.visibility = "hidden";
}

function getElemRefs(id) {
var el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? getLyrRef(id,document): null;
if (el) el.css = (el.style)? el.style: el;
return el;
}

// get reference to nested layer for ns4
// from old dhtmllib.js by Mike Hall of www.brainjar.com
function getLyrRef(lyr,doc) {
if (document.layers) {
var theLyr;
for (var i=0; i 0)
if ((theLyr = getLyrRef(lyr,theLyr.document)) != null)
return theLyr;
}
return null;
}
}