function collectNotes()
{
var notes = new Array();
var divs = document.body.getElementsByTagName("div");
for (var i = 0; i < divs.length; ++i)
{
div = divs.item(i);
if (hasClass(div, "handout"))
{
// add slide to collection
notes[notes.length] = div;
// hide handout notes as they are found
div.style.display = "none";
div.style.visibility = "hidden";
}
}
return notes;
}
// return new array of all
// including named backgrounds e.g. class="background titlepage"
function collectBackgrounds()
{
var backgrounds = new Array();
var divs = document.body.getElementsByTagName("div");
for (var i = 0; i < divs.length; ++i)
{
div = divs.item(i);
if (hasClass(div, "background"))
{
// add slide to collection
backgrounds[backgrounds.length] = div;
// hide named backgrounds as they are found
// e.g. class="background epilog"
if (getClassList(div) != "background")
{
div.style.display = "none";
div.style.visibility = "hidden";
}
}
}
return backgrounds;
}
// show just the backgrounds pertinent to this slide
function syncBackground(slide)
{
var background;
var bgColor;
if (slide.currentStyle)
bgColor = slide.currentStyle["backgroundColor"];
else if (document.defaultView)
{
var styles = document.defaultView.getComputedStyle(slide,null);
if (styles)
bgColor = styles.getPropertyValue("background-color");
else // broken implementation probably due Safari or Konqueror
{
//alert("defective implementation of getComputedStyle()");
bgColor = "transparent";
}
}
else
bgColor == "transparent";
if (bgColor == "transparent")
{
var slideClass = getClassList(slide);
for (var i = 0; i < backgrounds.length; i++)
{
background = backgrounds[i];
var bgClass = getClassList(background);
if (matchingBackground(slideClass, bgClass))
{
background.style.display = "block";
background.style.visibility = "visible";
}
else
{
background.style.display = "none";
background.style.visibility = "hidden";
}
}
}
else // forcibly hide all backgrounds
hideBackgrounds();
}
function hideBackgrounds()
{
for (var i = 0; i < backgrounds.length; i++)
{
background = backgrounds[i];
background.style.display = "none";
background.style.visibility = "hidden";
}
}
// compare classes for slide and background
function matchingBackground(slideClass, bgClass)
{
if (bgClass == "background")
return true;
// define pattern as regular expression
var pattern = /\w+/g;
// check for matches and place result in array
var result = slideClass.match(pattern);
// now check if desired name is present for background
for (var i = 0; i < result.length; i++)
{
if (hasToken(bgClass, result[i]))
return true;
}
return false;
}
// left to right traversal of root's content
function nextNode(root, node)
{
if (node == null)
return root.firstChild;
if (node.firstChild)
return node.firstChild;
if (node.nextSibling)
return node.nextSibling;
for (;;)
{
node = node.parentNode;
if (!node || node == root)
break;
if (node && node.nextSibling)
return node.nextSibling;
}
return null;
}
// right to left traversal of root's content
function previousNode(root, node)
{
if (node == null)
{
node = root.lastChild;
if (node)
{
while (node.lastChild)
node = node.lastChild;
}
return node;
}
if (node.previousSibling)
{
node = node.previousSibling;
while (node.lastChild)
node = node.lastChild;
return node;
}
if (node.parentNode != root)
return node.parentNode;
return null;
}
// HTML elements that can be used with class="incremental"
// note that you can also put the class on containers like
// up, ol, dl, and div to make their contents appear
// incrementally. Upper case is used since this is what
// browsers report for HTML node names (text/html).
function incrementalElementList()
{
var inclist = new Array();
inclist["P"] = true;
inclist["PRE"] = true;
inclist["LI"] = true;
inclist["BLOCKQUOTE"] = true;
inclist["DT"] = true;
inclist["DD"] = true;
inclist["H2"] = true;
inclist["H3"] = true;
inclist["H4"] = true;
inclist["H5"] = true;
inclist["H6"] = true;
inclist["SPAN"] = true;
inclist["ADDRESS"] = true;
inclist["TABLE"] = true;
inclist["TR"] = true;
inclist["TH"] = true;
inclist["TD"] = true;
inclist["IMG"] = true;
inclist["OBJECT"] = true;
return inclist;
}
function nextIncrementalItem(node)
{
var slide = slides[slidenum];
for (;;)
{
node = nextNode(slide, node);
if (node == null || node.parentNode == null)
break;
if (node.nodeType == 1) // ELEMENT
{
if (node.nodeName == "BR")
continue;
if (hasClass(node, "incremental")
&& okayForIncremental[node.nodeName])
return node;
if (hasClass(node.parentNode, "incremental")
&& !hasClass(node, "non-incremental"))
return node;
}
}
return node;
}
function previousIncrementalItem(node)
{
var slide = slides[slidenum];
for (;;)
{
node = previousNode(slide, node);
if (node == null || node.parentNode == null)
break;
if (node.nodeType == 1)
{
if (node.nodeName == "BR")
continue;
if (hasClass(node, "incremental")
&& okayForIncremental[node.nodeName])
return node;
if (hasClass(node.parentNode, "incremental")
&& !hasClass(node, "non-incremental"))
return node;
}
}
return node;
}
// set visibility for all elements on current slide with
// a parent element with attribute class="incremental"
function setVisibilityAllIncremental(value)
{
var node = nextIncrementalItem(null);
while (node)
{
node.style.visibility = value;
node = nextIncrementalItem(node);
}
}
// reveal the next hidden item on the slide
// node is null or the node that was last revealed
function revealNextItem(node)
{
node = nextIncrementalItem(node);
if (node && node.nodeType == 1) // an element
node.style.visibility = "visible";
return node;
}
// exact inverse of revealNextItem(node)
function hidePreviousItem(node)
{
if (node && node.nodeType == 1) // an element
node.style.visibility = "hidden";
return previousIncrementalItem(node);
}
/* set click handlers on all anchors */
function patchAnchors()
{
var anchors = document.body.getElementsByTagName("a");
for (var i = 0; i < anchors.length; ++i)
{
anchors[i].onclick = clickedAnchor;
}
}
function clickedAnchor(e)
{
if (!e)
var e = window.event;
// compare this.href with location.href
// for link to another slide in this doc
if (pageAddress(this.href) == pageAddress(location.href))
{
// yes, so find new slide number
var newslidenum = findSlideNumber(this.href);
if (newslidenum != slidenum)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = newslidenum;
slide = slides[slidenum];
showSlide(slide);
setLocation();
}
}
else if (this.target == null)
location.href = this.href;
this.blur();
stopPropagation(e);
}
function pageAddress(uri)
{
var i = uri.indexOf("#");
// check if anchor is entire page
if (i < 0)
return uri; // yes
return uri.substr(0, i);
}
function showSlideNumber()
{
slideNumElement.innerHTML = "slide".localize() + " " +
(slidenum + 1) + "/" + slides.length;
}
function setLocation()
{
var uri = pageAddress(location.href);
if (slidenum > 0)
uri = uri + "#(" + (slidenum+1) + ")";
if (uri != location.href && !khtml)
location.href = uri;
document.title = title + " (" + (slidenum+1) + ")";
//document.title = (slidenum+1) + ") " + slideName(slidenum);
showSlideNumber();
}
// find current slide based upon location
// first find target anchor and then look
// for associated div element enclosing it
// finally map that to slide number
function findSlideNumber(uri)
{
// first get anchor from page location
var i = uri.indexOf("#");
// check if anchor is entire page
if (i < 0)
return 0; // yes
var anchor = uri.substr(i+1);
// now use anchor as XML ID to find target
var target = document.getElementById(anchor);
if (!target)
{
// does anchor look like "(2)" for slide 2 ??
// where first slide is (1)
var re = /\((\d)+\)/;
if (anchor.match(re))
{
var num = parseInt(anchor.substring(1, anchor.length-1));
if (num > slides.length)
num = 1;
if (--num < 0)
num = 0;
return num;
}
// accept [2] for backwards compatibility
re = /\[(\d)+\]/;
if (anchor.match(re))
{
var num = parseInt(anchor.substring(1, anchor.length-1));
if (num > slides.length)
num = 1;
if (--num < 0)
num = 0;
return num;
}
// oh dear unknown anchor
return 0;
}
// search for enclosing slide
while (true)
{
// browser coerces html elements to uppercase!
if (target.nodeName.toLowerCase() == "div" &&
hasClass(target, "slide"))
{
// found the slide element
break;
}
// otherwise try parent element if any
target = target.parentNode;
if (!target)
{
return 0; // no luck!
}
};
for (i = 0; i < slides.length; ++i)
{
if (slides[i] == target)
return i; // success
}
// oh dear still no luck
return 0;
}
// find slide name from first h1 element
// default to document title + slide number
function slideName(index)
{
var name = null;
var slide = slides[index];
var heading = findHeading(slide);
if (heading)
name = extractText(heading);
if (!name)
name = title + "(" + (index + 1) + ")";
name.replace(/\&/g, "&");
name.replace(/\/g, ">");
return name;
}
// find first h1 element in DOM tree
function findHeading(node)
{
if (!node || node.nodeType != 1)
return null;
if (node.nodeName == "H1" || node.nodeName == "h1")
return node;
var child = node.firstChild;
while (child)
{
node = findHeading(child);
if (node)
return node;
child = child.nextSibling;
}
return null;
}
// recursively extract text from DOM tree
function extractText(node)
{
if (!node)
return "";
// text nodes
if (node.nodeType == 3)
return node.nodeValue;
// elements
if (node.nodeType == 1)
{
node = node.firstChild;
var text = "";
while (node)
{
text = text + extractText(node);
node = node.nextSibling;
}
return text;
}
return "";
}
// find copyright text from meta element
function findCopyright()
{
var name, content;
var meta = document.getElementsByTagName("meta");
for (var i = 0; i < meta.length; ++i)
{
name = meta[i].getAttribute("name");
content = meta[i].getAttribute("content");
if (name == "copyright")
return content;
}
return null;
}
function findSizeAdjust()
{
var name, content, offset;
var meta = document.getElementsByTagName("meta");
for (var i = 0; i < meta.length; ++i)
{
name = meta[i].getAttribute("name");
content = meta[i].getAttribute("content");
if (name == "font-size-adjustment")
return 1 * content;
}
return 0;
}
function addToolbar()
{
var slideCounter, page;
var toolbar = createElement("div");
toolbar.setAttribute("class", "toolbar");
if (ns_pos) // a reasonably behaved browser
{
var right = document.createElement("div");
right.setAttribute("style", "float: right; text-align: right");
slideCounter = document.createElement("div")
slideCounter.innerHTML = "slide".localize() + " n/m";
right.appendChild(slideCounter);
toolbar.appendChild(right);
var left = document.createElement("div");
left.setAttribute("style", "text-align: left");
// global end of slide indicator
eos = document.createElement("span");
eos.innerHTML = "* ";
left.appendChild(eos);
var help = document.createElement("a");
help.setAttribute("href", helpPage);
help.setAttribute("title", helpText.localize());
help.innerHTML = "help?".localize();
left.appendChild(help);
helpAnchor = help; // save for focus hack
var gap1 = document.createTextNode(" ");
left.appendChild(gap1);
var contents = document.createElement("a");
contents.setAttribute("href", "javascript:toggleTableOfContents()");
contents.setAttribute("title", "table of contents".localize());
contents.innerHTML = "contents?".localize();
left.appendChild(contents);
var gap2 = document.createTextNode(" ");
left.appendChild(gap2);
var i = location.href.indexOf("#");
// check if anchor is entire page
if (i > 0)
page = location.href.substr(0, i);
else
page = location.href;
var start = document.createElement("a");
start.setAttribute("href", page);
start.setAttribute("title", "restart presentation".localize());
start.innerHTML = "restart?".localize();
// start.setAttribute("href", "javascript:printSlides()");
// start.setAttribute("title", "print all slides".localize());
// start.innerHTML = "print!".localize();
left.appendChild(start);
var copyright = findCopyright();
if (copyright)
{
var span = document.createElement("span");
span.innerHTML = copyright;
span.style.color = "#ffffff";
span.style.marginLeft = "4em";
left.appendChild(span);
}
toolbar.appendChild(left);
}
else // IE so need to work around its poor CSS support
{
toolbar.style.position = "absolute";
toolbar.style.zIndex = "200";
toolbar.style.width = "100%";
toolbar.style.height = "1.2em";
toolbar.style.top = "auto";
toolbar.style.bottom = "0";
toolbar.style.left = "0";
toolbar.style.right = "0";
toolbar.style.textAlign = "left";
toolbar.style.fontSize = "60%";
toolbar.style.color = "red";
toolbar.borderWidth = 0;
toolbar.style.background = "rgb(240,240,240)";
// would like to have help text left aligned
// and page counter right aligned, floating
// div's don't work, so instead use nested
// absolutely positioned div's.
var sp = document.createElement("span");
sp.innerHTML = " * ";
toolbar.appendChild(sp);
eos = sp; // end of slide indicator
var help = document.createElement("a");
help.setAttribute("href", helpPage);
help.setAttribute("title", helpText.localize());
help.innerHTML = "help?".localize();
toolbar.appendChild(help);
helpAnchor = help; // save for focus hack
var gap1 = document.createTextNode(" ");
toolbar.appendChild(gap1);
var contents = document.createElement("a");
contents.setAttribute("href", "javascript:toggleTableOfContents()");
contents.setAttribute("title", "table of contents".localize());
contents.innerHTML = "contents?".localize();
toolbar.appendChild(contents);
var gap2 = document.createTextNode(" ");
toolbar.appendChild(gap2);
var i = location.href.indexOf("#");
// check if anchor is entire page
if (i > 0)
page = location.href.substr(0, i);
else
page = location.href;
var start = document.createElement("a");
start.setAttribute("href", page);
start.setAttribute("title", "restart presentation".localize());
start.innerHTML = "restart?".localize();
// start.setAttribute("href", "javascript:printSlides()");
// start.setAttribute("title", "print all slides".localize());
// start.innerHTML = "print!".localize();
toolbar.appendChild(start);
var copyright = findCopyright();
if (copyright)
{
var span = document.createElement("span");
span.innerHTML = copyright;
span.style.color = "black";
span.style.marginLeft = "2em";
toolbar.appendChild(span);
}
slideCounter = document.createElement("div")
slideCounter.style.position = "absolute";
slideCounter.style.width = "auto"; //"20%";
slideCounter.style.height = "1.2em";
slideCounter.style.top = "auto";
slideCounter.style.bottom = 0;
slideCounter.style.right = "0";
slideCounter.style.textAlign = "right";
slideCounter.style.color = "red";
slideCounter.style.background = "rgb(240,240,240)";
slideCounter.innerHTML = "slide".localize() + " n/m";
toolbar.appendChild(slideCounter);
}
// ensure that click isn't passed through to the page
toolbar.onclick = stopPropagation;
document.body.appendChild(toolbar);
slideNumElement = slideCounter;
setEosStatus(false);
return toolbar;
}
function isShownToc()
{
if (toc && toc.style.visible == "visible")
return true;
return false;
}
function showTableOfContents()
{
if (toc)
{
if (toc.style.visible != "visible")
{
toc.style.visible = "visible";
toc.style.display = "block";
toc.focus();
}
else
hideTableOfContents();
}
}
function hideTableOfContents()
{
if (toc)
{
toc.style.visible = "hidden";
toc.style.display = "none";
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
}
function toggleTableOfContents()
{
if (toc)
{
if (toc.style.visible != "visible")
showTableOfContents();
else
hideTableOfContents();
}
}
// called on clicking toc entry
function gotoEntry(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
if (target && target.nodeType == 1)
{
var uri = target.getAttribute("href");
if (uri)
{
//alert("going to " + uri);
var slide = slides[slidenum];
hideSlide(slide);
slidenum = findSlideNumber(uri);
slide = slides[slidenum];
lastShown = null;
setLocation();
setVisibilityAllIncremental("hidden");
setEosStatus(!nextIncrementalItem(lastShown));
showSlide(slide);
//target.focus();
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
}
hideTableOfContents(e);
stopPropagation(e);
return cancel(e);
}
// called onkeydown for toc entry
function gotoTocEntry(event)
{
var key;
if (!event)
var event = window.event;
// kludge around NS/IE differences
if (window.event)
key = window.event.keyCode;
else if (event.which)
key = event.which;
else
return true; // Yikes! unknown browser
// ignore event if key value is zero
// as for alt on Opera and Konqueror
if (!key)
return true;
// check for concurrent control/command/alt key
// but are these only present on mouse events?
if (event.ctrlKey || event.altKey)
return true;
if (key == 13)
{
var uri = this.getAttribute("href");
if (uri)
{
//alert("going to " + uri);
var slide = slides[slidenum];
hideSlide(slide);
slidenum = findSlideNumber(uri);
slide = slides[slidenum];
lastShown = null;
setLocation();
setVisibilityAllIncremental("hidden");
setEosStatus(!nextIncrementalItem(lastShown));
showSlide(slide);
//target.focus();
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
hideTableOfContents();
return cancel(event);
}
if (key == 40 && this.next)
{
this.next.focus();
return cancel(event);
}
if (key == 38 && this.previous)
{
this.previous.focus();
return cancel(event);
}
return true;
}
// create div element with links to each slide
function tableOfContents()
{
var toc = document.createElement("div");
addClass(toc, "toc");
//toc.setAttribute("tabindex", "0");
var heading = document.createElement("div");
addClass(heading, "toc-heading");
heading.innerHTML = "Table of Contents".localize();
heading.style.textAlign = "center";
heading.style.width = "100%";
heading.style.margin = "0";
heading.style.marginBottom = "1em";
heading.style.borderBottomStyle = "solid";
heading.style.borderBottomColor = "rgb(180,180,180)";
heading.style.borderBottomWidth = "1px";
toc.appendChild(heading);
var previous = null;
for (var i = 0; i < slides.length; ++i)
{
var num = document.createTextNode((i + 1) + ". ");
toc.appendChild(num);
var a = document.createElement("a");
a.setAttribute("href", "#(" + (i+1) + ")");
var name = document.createTextNode(slideName(i));
a.appendChild(name);
a.onclick = gotoEntry;
a.onkeydown = gotoTocEntry;
a.previous = previous;
if (previous)
previous.next = a;
toc.appendChild(a);
if (i == 0)
toc.first = a;
if (i < slides.length - 1)
{
var br = document.createElement("br");
toc.appendChild(br);
}
previous = a;
}
toc.focus = function () {
if (this.first)
this.first.focus();
}
toc.onclick = function (e) {
hideTableOfContents();
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
return false;
};
toc.style.position = "absolute";
toc.style.zIndex = "300";
toc.style.width = "60%";
toc.style.maxWidth = "30em";
toc.style.height = "30em";
toc.style.overflow = "auto";
toc.style.top = "auto";
toc.style.right = "auto";
toc.style.left = "4em";
toc.style.bottom = "4em";
toc.style.padding = "1em";
toc.style.background = "rgb(240,240,240)";
toc.style.borderStyle = "solid";
toc.style.borderWidth = "2px";
toc.style.fontSize = "60%";
document.body.insertBefore(toc, document.body.firstChild);
return toc;
}
function replaceByNonBreakingSpace(str)
{
for (var i = 0; i < str.length; ++i)
str[i] = 160;
}
function initOutliner()
{
var items = document.getElementsByTagName("LI");
for (var i = 0; i < items.length; ++i)
{
var target = items[i];
if (!hasClass(target.parentNode, "outline"))
continue;
target.onclick = outlineClick;
if (!ns_pos)
{
target.onmouseover = hoverOutline;
target.onmouseout = unhoverOutline;
}
if (foldable(target))
{
target.foldable = true;
target.onfocus = function () {outline = this;};
target.onblur = function () {outline = null;};
if (!target.getAttribute("tabindex"))
target.setAttribute("tabindex", "0");
if (hasClass(target, "expand"))
unfold(target);
else
fold(target);
}
else
{
addClass(target, "nofold");
target.visible = true;
target.foldable = false;
}
}
}
function foldable(item)
{
if (!item || item.nodeType != 1)
return false;
var node = item.firstChild;
while (node)
{
if (node.nodeType == 1 && isBlock(node))
return true;
node = node.nextSibling;
}
return false;
}
function fold(item)
{
if (item)
{
removeClass(item, "unfolded");
addClass(item, "folded");
}
var node = item ? item.firstChild : null;
while (node)
{
if (node.nodeType == 1 && isBlock(node)) // element
{
// note that getElementStyle won't work for Safari 1.3
node.display = getElementStyle(node, "display", "display");
node.style.display = "none";
node.style.visibility = "hidden";
}
node = node.nextSibling;
}
item.visible = false;
}
function unfold(item)
{
if (item)
{
addClass(item, "unfolded");
removeClass(item, "folded");
}
var node = item ? item.firstChild : null;
while (node)
{
if (node.nodeType == 1 && isBlock(node)) // element
{
// with fallback for Safari, see above
node.style.display = (node.display ? node.display : "block");
node.style.visibility = "visible";
}
node = node.nextSibling;
}
item.visible = true;
}
function outlineClick(e)
{
var rightclick = false;
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (!target)
return true;
if (e.which)
rightclick = (e.which == 3);
else if (e.button)
rightclick = (e.button == 2);
if (!rightclick && target.visible != undefined)
{
if (target.foldable)
{
if (target.visible)
fold(target);
else
unfold(target);
}
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
}
return false;
}
function hoverOutline(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (target && target.foldable)
target.style.cursor = "pointer";
return true;
}
function unhoverOutline(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (target)
target.style.cursor = "default";
return true;
}
function stopPropagation(e)
{
if (window.event)
{
window.event.cancelBubble = true;
//window.event.returnValue = false;
}
else if (e)
{
e.cancelBubble = true;
e.stopPropagation();
//e.preventDefault();
}
}
/* can't rely on display since we set that to none to hide things */
function isBlock(elem)
{
var tag = elem.nodeName;
return tag == "OL" || tag == "UL" || tag == "P" ||
tag == "LI" || tag == "TABLE" || tag == "PRE" ||
tag == "H1" || tag == "H2" || tag == "H3" ||
tag == "H4" || tag == "H5" || tag == "H6" ||
tag == "BLOCKQUOTE" || tag == "ADDRESS";
}
function getElementStyle(elem, IEStyleProp, CSSStyleProp)
{
if (elem.currentStyle)
{
return elem.currentStyle[IEStyleProp];
}
else if (window.getComputedStyle)
{
var compStyle = window.getComputedStyle(elem, "");
return compStyle.getPropertyValue(CSSStyleProp);
}
return "";
}
// works with text/html and text/xhtml+xml with thanks to Simon Willison
function createElement(element)
{
if (typeof document.createElementNS != 'undefined')
{
return document.createElementNS('http://www.w3.org/1999/xhtml', element);
}
if (typeof document.createElement != 'undefined')
{
return document.createElement(element);
}
return false;
}
// designed to work with both text/html and text/xhtml+xml
function getElementsByTagName(name)
{
if (typeof document.getElementsByTagNameNS != 'undefined')
{
return document.getElementsByTagNameNS('http://www.w3.org/1999/xhtml', name);
}
if (typeof document.getElementsByTagName != 'undefined')
{
return document.getElementsByTagName(name);
}
return null;
}
/*
// clean alternative to innerHTML method, but on IE6
// it doesn't work with named entities like
// which need to be replaced by numeric entities
function insertText(element, text)
{
try
{
element.textContent = text; // DOM3 only
}
catch (e)
{
if (element.firstChild)
{
// remove current children
while (element.firstChild)
element.removeChild(element.firstChild);
}
element.appendChild(document.createTextNode(text));
}
}
// as above, but as method of all element nodes
// doesn't work in IE6 which doesn't allow you to
// add methods to the HTMLElement prototype
if (HTMLElement != undefined)
{
HTMLElement.prototype.insertText = function(text) {
var element = this;
try
{
element.textContent = text; // DOM3 only
}
catch (e)
{
if (element.firstChild)
{
// remove current children
while (element.firstChild)
element.removeChild(element.firstChild);
}
element.appendChild(document.createTextNode(text));
}
};
}
*/
function getSelectedText()
{
try
{
if (window.getSelection)
return window.getSelection().toString();
if (document.getSelection)
return document.getSelection().toString();
if (document.selection)
return document.selection.createRange().text;
}
catch (e)
{
return "";
}
return "";
}