// Credits: http://www.holovaty.com/js/main.js
function linksInNewWindow(a) {
var b=a?"_blank":"_self";
var c=document.links;
for(var i=0;i<c.length;i++) {if(c[i].href.search("rkcsi.indiana.edu")==-1) c[i].target=b};
var date=new Date();
date.setTime(date.getTime()+(14*24*60*60*1000));
document.cookie=a?"newwin=true; expires="+date.toGMTString()+";":"newwin=false;";
}

// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details, visit ALA:
// http://www.alistapart.com/stories/alternate/

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function initStyleSwitcher() {
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

function exitStyleSwitcher() {
	var title = getActiveStyleSheet();
	createCookie("style", title, 365);
}

// Custom
function initActiveNav()
{
	var active = document.getElementById("active");
	if (active)
	{
		active.parentNode.parentNode.style.display = "block";
	}
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  *
  * Title : 		Preview Your Links with Unobtrusive JavaScript
  * Author : 		Chris Campbell
  * URL : 		http://particletree.com/features/preview-your-links
  *
  * Description :	Inspired by the TargetAlert Firefox extension that “provides visual cues for
  *			the destinations of hyperlinks” and Christian Heilmann’s Image previews with 
  *			DOM JavaScript, we wrote a simple set of unobtrusive JavaScript functions to 
  *			find links on a page that go to amazon product pages, pdfs, word documents or
  *			whatever destination that might slow down the browsing process and adds an 
  *			icon next to them to let you know what you might expect to find behind a link.
  *
  * Created : 	7/24/2005
  * Modified : 	7/27/2005
  *
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/


/*
  * Summary:	Grabs all non-image links from the page and calls checkLinks() if amazon.com is not located in the link 
  */
function linkPreview(){
	var links = document.getElementsByTagName("a");

	for (i=0; i<links.length; i++){
		var currentLink = links[i];
		var	images = currentLink.getElementsByTagName("img");
		
	 	// Check if the link is an image. We don't want icons next to images.
		if (images.length == 0){
			var linkHref = currentLink.href;
			
			// Find all links directed to amazon.com 
			if (linkHref.match(/amazon.com/)){
				append(currentLink, "amazon");
			}
			else{
				checkLinks(linkHref, currentLink)
			}
		}
	}
}

/*
  * Summary:	Checks if the link goes to an external file (ie. .doc, .pdf) and calls append()
  * Parameters: 	The href of the link | the <a> object 
  */
function checkLinks(linkHref, currentLink){
	var linkHrefParts = linkHref.split(".");
	
	// extension is the last element in the LinkSplit array
	var extension = linkHrefParts[linkHrefParts.length - 1];
	
	// In some browsers there is a "/" placed after the link. removes the "/"
	extension = extension.replace("/","");
	
	if( extension in { doc:1, pdf:1, ppt:1, txt:1, xls:1, zip:1, mov:1 } ){
		append(currentLink, extension );
	}
}

/*
  * Summary:	Creates a span after the object passed in and sets the class to the link type
  * Parameters: 	<a> object | external link type
  */
function append(currentLink, extension){
	var span = document.createElement('span');
	span.innerHTML = "&nbsp;";
	currentLink.parentNode.insertBefore(span,currentLink.nextSibling);
	span.className = extension;
}

/*
 * Expandable list implementation.
 * by David Lindquist <first name><at><last name><dot><net>
 * See:
 * http://www.gazingus.org/html/DOM-Scripted_Lists_Revisited.html
 * Modifies lists so that sublists can be hidden and shown by means of
 * a switch. The switch is a node inserted into the DOM tree as the
 * first child of the list item containing the sublist.
 */

// The script will only be applied to lists containing this class name,
// e.g.: <ul class="foo expandable">...</ul>.
var CLASS_NAME = "expandable";

// This value is the assumed initial display style for a sublist when it cannot
// be determined by other means. See below.
var DEFAULT_DISPLAY = "none";

// The namespace to use when using this script in an XML context.
var XMLNS = "http://www.w3.org/1999/xhtml";

// The beginning of the title text for the switch when the sublist is collapsed.
var CLOSED_PREFIX = "Expand list: ";

// The beginning of the title text for the switch when the sublist is expanded.
var OPENED_PREFIX = "Collapse list: ";

/******************************************************************************/

// Returns a copy of a string with leading and trailing whitespace removed.
String.prototype.trim = function() {
    return this.replace(/^\s+/, "").replace(/\s+$/, "");
}

// Walks the DOM tree starting at a given root element. Returns an
// array of nodes of the specified type and conforming to the criteria
// of the given filter function. The filter should return a boolean.
function getNodesByType(root, type, filter) {
    var node = root;
    var nodes = [];
    var next;

    while (node != null) {
        if (node.hasChildNodes())
            node = node.firstChild;
        else if (node != root && null != (next = node.nextSibling))
            node = next;
        else {
            next = null;
            for ( ; node != root; node = node.parentNode) {
                next = node.nextSibling;
                if (next != null) break;
            }
            node = next;
        }
        if (node != null && node.nodeType == type && filter(node))
            nodes.push(node);
    }
    return nodes;
}

// Simulates the innerText property of IE and other browsers.
// Mozilla/Firefox need this.
function getInnerText(node) {
    if (node == null || node.nodeType != 1)
        return;
    var text = "";
    var textnodes = getNodesByType(node, 3, function() { return true; });
    for (var i = 0; i < textnodes.length; i++)
        text += textnodes[i].data;
    return text;
}

function initExpandableLists() {
    if (!document.getElementsByTagName) return;

    // Top-level function to accommodate browsers that do not register
    // a click event when a link is activated by the keyboard.
    switchNode = function(id) {
        var node = document.getElementById(id);
        if (node && /^switch /.test(node.className)) node.onclick();
    }

    // Top-level function to be assigned as the event handler for the
    // switch. This could have been bound to the handler as a closure,
    // but closures are associated with memory leak problems in IE.
    actuate = function() {
        var sublist = this.parentNode.getElementsByTagName("ul")[0] ||
                      this.parentNode.getElementsByTagName("ol")[0];
        if (sublist.style.display == "block") {
            sublist.style.display = "none";
            this.firstChild.data = ">";
            this.className = "switch off";
            this.title = this.title.replace(OPENED_PREFIX, CLOSED_PREFIX);
        } else {
            sublist.style.display = "block";
            this.firstChild.data = "v";
            this.className = "switch on";
            this.title = this.title.replace(CLOSED_PREFIX, OPENED_PREFIX);
        }
        return false;
    }

    // Create switch node from which the others will be cloned.
    if (typeof document.createElementNS == "function")
        var template = document.createElementNS(XMLNS, "a");
    else
        var template = document.createElement("a");
    template.appendChild(document.createTextNode(" "));

    var list, i = 0, j = 0;
    var pattern = new RegExp("(^| )" + CLASS_NAME + "( |$)");

    while ((list = document.getElementsByTagName("ul")[i++]) ||
           (list = document.getElementsByTagName("ol")[j++]))
    {
        // Only lists with the given class name are processed.
        if (pattern.test(list.className) == false) continue;

        var item, k = 0;
        while ((item = list.getElementsByTagName("li")[k++])) {
            var sublist = item.getElementsByTagName("ul")[0] ||
                          item.getElementsByTagName("ol")[0];
            // No sublist under this list item. Skip it.
            if (sublist == null) continue;

            // Attempt to determine initial display style of the
            // sublist so the proper symbol is used.
            var symbol;
            switch (sublist.style.display) {
            case "none" : symbol = ">"; break;
            case "block": symbol = "v"; break;
            default:
                var display = DEFAULT_DISPLAY;
                if (sublist.currentStyle) {
                    display = sublist.currentStyle.display;
                } else if (document.defaultView &&
                           document.defaultView.getComputedStyle &&
                           document.defaultView.getComputedStyle(sublist, ""))
                {
                    var view = document.defaultView;
                    var computed = view.getComputedStyle(sublist, "");
                    display = computed.getPropertyValue("display");
                }
                symbol = (display == "none") ? ">" : "v";
                // Explicitly set the display style to make sure it is
                // set for the next read. If it is somehow the empty
                // string, use the default value from the (X)HTML DTD.
                sublist.style.display = display || "block";
                break;
            }

            // This bit attempts to extract some text from the first
            // child node of the list item to append to the title
            // attribute of the switch.
            var child = item.firstChild;
            var text = "";
            while (child) {
                if (child.nodeType == 3 && "" != child.data.trim()) {
                    text = child.data;
                    break;
                } else if (child.nodeType == 1 &&
                           !/^[ou]l$/i.test(child.tagName))
                {
                    text = child.innerText || getInnerText(child);
                    break;
                }
                child = child.nextSibling;
            }

            var actuator = template.cloneNode(true);
            // a reasonably unique ID
            var uid = "switch" + i + "-" + j + "-" + k;
            actuator.id = uid;
            actuator.href = "javascript:switchNode('" + uid + "')";
            actuator.className = "switch " + ((symbol == ">") ? "off" : "on");
            actuator.title = ((symbol == ">")
                              ? CLOSED_PREFIX : OPENED_PREFIX) + text.trim();
            actuator.firstChild.data = symbol;
            actuator.onclick = actuate;
            item.insertBefore(actuator, item.firstChild);
        }
    }
}

//http://surfmind.com/musings/gems/alternaterowcolors.js
function alternateRowColors() {
	//var className = 'classes';
	var rowcolor = '#eee';
	var rows, arow;
	var tables = document.getElementsByTagName("table");
	var rowCount = 0;
	for(var i=0;i<tables.length;i++) {
		//dump(tables.item(i).className + " " + tables.item(i).nodeName + "\n");
		//if(tables.item(i).className == className) {
			atable = tables.item(i);
			rows = atable.getElementsByTagName("tr");
			for(var j=0;j<rows.length;j++) {
				arow = rows.item(j);
				if(arow.nodeName == "TR") {
					if(rowCount % 2) {
						arow.style.backgroundColor = rowcolor;
					} else {
						// default case
					}
					rowCount++;
				}
			}
			rowCount = 0;
		//}
	}
}

if (document.getElementById && document.getElementsByTagName)
{
	window.onload = function()
	{
		alternateRowColors();
		initExpandableLists();
		initStyleSwitcher();
		initActiveNav();
		linkPreview();
	}
	window.onunload = exitStyleSwitcher;
}