try {document.execCommand('BackgroundImageCache', false, true);} catch(e) {}

/*
 * Similar to the built in getElementById
 * Returns an array of all items that have the specified class
 *	searchClass - the class to search for
 *	node - specify a parent element to search in, default is document
 *	tag	- only search specific tags
 */
function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null ) node = document;
	if ( tag == null ) tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

/*
 * Adds an element to the DOM
 *	container - parent to add an element to
 *	elName - id to be given to the new element
 *	elType - type of element (span, p, div, etc)
 *	elContent - innerHTML added to the created element
 */
function addElement(container, elName, elType, elContent) {
  var container = document.getElementById(container);
  var newEl = document.createElement(elType);
  newEl.setAttribute('id',elName);
  newEl.innerHTML = elContent;
  container.appendChild(newEl);
}

/*
 * Remove an element from the DOM
 *	container - parent of item to be removed
 *	elId - id of element to be removed
 */
function removeElement(container, elId) {
	var container = document.getElementById(container);
  var el = document.getElementById(elId);
  container.removeChild(el);
}

/*
 * Toggles specified class on an element
 *	el - element to target
 *	className - class name to add or remove
 */
function toggleClass(el, className) {
  var curClass = el.className;
  var pattern = new RegExp("(^|\\s)"+className+"(\\s|$)");
  if ( pattern.test(curClass) )
 		el.className = curClass.replace(pattern, "");
	else
		el.className += " " + className;
}

/*
 * Adds specified class to an element if it does not already exists
 *	el - element to target
 *	className - class name to add
 */
function addClass(el, className) {
  var curClass = el.className;
  var pattern = new RegExp("(^|\\s)"+className+"(\\s|$)");
  if (!pattern.test(curClass))
  	el.className += " " + className;
}

/*
 * Removes specified class from an element if it exists
 *	el - element to target
 *	className - class name to remove
 */
function removeClass(el, className) {
  var curClass = el.className;
  var pattern = new RegExp("(^|\\s)"+className+"(\\s|$)");
  if (pattern.test(curClass))
  	el.className = curClass.replace(pattern, "");
}

/*
 * Assigns a class to a container on mouseover and mouseout
 * Used to replicate hover affects on groups of objects
 *	className - all elements with the specified class
 *							will be affected
 */
function hoverBox(className) {
	var boxes = getElementsByClass(className);
  for(var i=0;i<boxes.length;i++) {
    boxes[i].onmouseover = function(){toggleClass(this, "hoverlink");};
    boxes[i].onmouseout = function(){toggleClass(this, "hoverlink");};
    boxes[i].onclick = function(){
	    window.location = this.getElementsByTagName("a")[0].getAttribute("href");
	  };
  }
}

/*
 * Toggle an open/close state for a container
 * Class of "closed" is added or removed from a container
 * If no trigger id is provided a trigger will be dynamiclly created
 *	container - id of element
 *	trigger - id of the element that triggers to event
 *						default = container + _trigger  (contentBox_trigger)
 *	isClosed - boolean, sets whether the default state of the container is open or closed
 *						 default = 1 (closed)
 */
function toggleClosed(container, trigger, isClosed) {
	//set some variables
	var triggerDefined = 1;
	var el = document.getElementById(container);
	var t = document.getElementById(trigger);

	//assign default values if no arguments passed
	isClosed = 	(typeof isClosed == 'undefined') ? 1 : isClosed;
	if (!t) {
		triggerDefined = 0;
		trigger = container + "_trigger";
	}

	//add a trigger if needed
	if(!triggerDefined)	{
		addElement(container, trigger, "span", "open/close");
		t = document.getElementById(trigger);
	}

	//set default state (open or closed)
	if(isClosed)
		addClass(el, "closed");
	else
		removeClass(el, "closed");

	//Open or close the container when the trigger is clicked
	t.onclick = function(){
		toggleClass(el, "closed");
	};
}

/*
 * Creates tabbed effects for the search options
 */
function tabifySearch(className, node, tag) {
	var tabs = getElementsByClass(className, node, tag);
  for(var i=0;i<tabs.length;i++) {
    tabs[i].getElementsByTagName("A")[0].onclick = function() {
	    removeClass(document.getElementById("search-all"), "active");
	    removeClass(document.getElementById("search-books"), "active");
	    removeClass(document.getElementById("search-articles"), "active");
	    removeClass(document.getElementById("search-movies"), "active");
	    addClass(this.parentNode, "active");
	    return false;
	   };
  }
}

/*
 * Used with iframe Thickbox
 * Traps all click events on non-anchor(#) links inside the iframe
 * opens the URL in the parent window instead of the iframe
 */
function externalLinksToParent() {
	var allLinks = document.getElementsByTagName("A");
	for(var i=0;i<allLinks.length;i++) {
		var theLocation = allLinks[i].getAttribute("href");
		if(theLocation && theLocation.indexOf('#') == -1) {
			allLinks[i].onclick = function() {
				parent.window.location = this.getAttribute("href");
				return false;
			};
		}
	}
}

/*
 * Uses javascript to replicate hover functionality on elements
 * other than <a> in IE
 * Not needed for standards complaint browsers which can use CSS
 */
function jsHover() {
	var items = getElementsByClass("dropdown");
  for(var i=0;i<items.length;i++) {
    items[i].onmouseover = function() {addClass(this, "jshover");};
    items[i].onmouseout = function() {removeClass(this, "jshover");};
  }
}

$(document).ready(function(){tabifySearch("tab")});

//Only target IE.   Firefox, Safari, and Opera do not need
//MUST come at end of document
if (document.all&&document.getElementById) $(document).ready(function(){jsHover()});


/*
 * Thickbox 3 - One Box To Rule Them All.
 * By Cody Lindley (http://www.codylindley.com)
 * Copyright (c) 2007 cody lindley
 * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
 */
var tb_pathToImage = "/styles/images/library/loadingAnimation.gif";
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//end Thickbox