var d = document;
function imageSwitch(id, s) {
if (d.images && d.images[id]) {
d.images[id].src = s;
}
}
function changeClass(e, newClass) {
var el = d.getElementById(e);
if (el == null) {
e.className = newClass;
} else {
el.className = newClass;
}
}
function displayToggle(div) {
var d = document;
var e = d.getElementById(div);
var s = e.style.display;
var set = (s == "block" || s == "inline") ? "none" : "block";
e.style.display = set;
}
function toggleVar(v, div) {
var d = document;
if (d[v]) {
var k = d.getElementById(d[v]);
k.style.display = "none";
}
d[v] = div;
var e = d.getElementById(div);
e.style.display = "block";
}
function toggleVarNews(v, div, id) {
var d = document;
if (d[v]) {
var k = d.getElementById("news" + d[v]);
k.style.display = "none";
var k = d.getElementById("newsNav_" + d[v]);
k.style.fontWeight = "normal";
}
d[v] = id;
var k = d.getElementById("newsNav_" + id);
k.style.fontWeight = "bold";
var e = d.getElementById(div);
e.style.display = "block";
}
function forceToggle(on, off) {
var d = document;
var eOff = d.getElementById(off);
eOff.style.display = "none";
var eOn = d.getElementById(on);
eOn.style.display = "block";
}
var flash = '
View our heating demonstration';
var flash2 = '
View our cooling demonstration';
function writeFlash(div, use2) {
var d = document;
var e = d.getElementById(div);
if (use2) {
e.innerHTML = flash2;
} else {
e.innerHTML = flash;
}
}
var prevText = "";
var curThumb = "drilling";
function writeText(id, t, tag) {
var d = document;
var e = d.getElementById(id);
if (e) {
prevText = e.innerHTML;
e.innerHTML = '<' + tag + '>' + t + '';
}
}
function restoreText(id) {
var d = document;
var e = d.getElementById(id);
if (e) {
e.innerHTML = prevText;
}
}
function selectThumb(id) {
var d = document;
forceToggle(id, curThumb);
var i = curThumb + "_thumb";
changeClass(i, "thumb");
curThumb = id;
var i = curThumb + "_thumb";
changeClass(i, "thumb_selected");
var e = d.getElementById('caption');
prevText = e.innerHTML;
}
function notHere(text) {
document.write("" + text + "");
}