/**
 * "targ" is the element which caused this function to be called
 * from http://www.quirksmode.org/js/events_properties.html
 **/
function $(e) {
	if (typeof e == 'string') {
		return document.getElementById(e);
	}
	var targ;
	if (!e) {
		e = window.event;
	}
	if (e.target) {
		targ = e.target;
	} else if (e.srcElement) {
		targ = e.srcElement;
	} else if (typeof e == 'object') {
		targ = e;
	}
	if (targ.nodeType == 3) { // defeat Safari bug
		targ = targ.parentNode;
	}

	return targ;
}

// -------------------------------- events

/**
 * addEvent written by Dean Edwards, 2005
 * with input from Tino Zijdel
 *
 * http://dean.edwards.name/weblog/2005/10/add-event/
 **/

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
}
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
	this.cancelBubble = true;
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(window.event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
}

function addEvent(element, type, handler) {
	// assign each event handler a unique ID
	if (!handler.$$guid) {
		handler.$$guid = addEvent.guid++;
	}
	// create a hash table of event types for the element
	if (!element.events) {
		element.events = {};
	}
	// create a hash table of event handlers for each element/event pair
	var handlers = element.events[type];
	if (!handlers) {
		handlers = element.events[type] = {};
		// store the existing event handler (if there is one)
		if (element["on" + type]) {
			handlers[0] = element["on" + type];
		}
	}
	// store the event handler in the hash table
	handlers[handler.$$guid] = handler;
	// assign a global event handler to do all the work
	element["on" + type] = handleEvent;
}

// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	// delete the event handler from the hash table
	if (element.events && element.events[type]) {
		delete element.events[type][handler.$$guid];
	}
}

// end from Dean Edwards

// -------------------------------- css

/**
 * Written by Neil Crosby.
 * http://www.workingwith.me.uk/
 *
 * Use this wherever you want, but please keep this comment at the top of this file.
 *
 * Copyright (c) 2006 Neil Crosby
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 **/
var css = {
	/**
	 * Returns an array containing references to all elements
	 * of a given tag type within a certain node which have a given class
	 *
	 * @param node		the node to start from
	 *					(e.g. document,
	 *						  getElementById('whateverStartpointYouWant')
	 *					)
	 * @param searchClass the class we're wanting
	 *					(e.g. 'some_class')
	 * @param tag		 the tag that the found elements are allowed to be
	 *					(e.g. '*', 'div', 'li')
	 **/
	getElementsByClass : function(node, searchClass, tag) {
		var classElements = [];
		var els = node.getElementsByTagName(tag);
		var elsLen = els.length;

		for (var i = 0, j = 0; i < elsLen; i++) {
			if (this.elementHasClass(els[i], searchClass) ) {
				classElements[j] = els[i];
				j++;
			}
		}
		return classElements;
	},


	/**
	 * PRIVATE.	 Returns an array containing all the classes applied to this
	 * element.
	 *
	 * Used internally by elementHasClass(), addClassToElement() and
	 * removeClassFromElement().
	 **/
	privateGetClassArray: function(el) {
		return el.className.split(' ');
	},

	/**
	 * PRIVATE.	 Creates a string from an array of class names which can be used
	 * by the className function.
	 *
	 * Used internally by addClassToElement().
	 **/
	privateCreateClassString: function(classArray) {
		return classArray.join(' ');
	},

	/**
	 * Returns true if the given element has been assigned the given class.
	 **/
	elementHasClass: function(el, classString) {
		if (!el) {
			return false;
		}

		var regex = new RegExp('\\b'+classString+'\\b');
		if (el.className.match(regex)) {
			return true;
		}

		return false;
	},

	/**
	 * Adds classString to the classes assigned to the element with id equal to
	 * idString.
	 **/
	addClassToId: function(idString, classString) {
		this.addClassToElement($(idString), classString);
	},

	/**
	 * Adds classString to the classes assigned to the given element.
	 * If the element already has the class which was to be added, then
	 * it is not added again.
	 **/
	addClassToElement: function(el, classString) {
		var classArray = this.privateGetClassArray(el);

		if (this.elementHasClass(el, classString)) {
			return; // already has element so don't need to add it
		}

		classArray.push(classString);

		el.className = this.privateCreateClassString(classArray);
	},

	/**
	 * Removes the given classString from the list of classes assigned to the
	 * element with id equal to idString
	 **/
	removeClassFromId: function(idString, classString) {
		this.removeClassFromElement($(idString), classString);
	},

	/**
	 * Removes the given classString from the list of classes assigned to the
	 * given element.  If the element has the same class assigned to it twice,
	 * then only the first instance of that class is removed.
	 **/
	removeClassFromElement: function(el, classString) {
		var classArray = this.privateGetClassArray(el);

		for (x in classArray) {
			if (classString == classArray[x]) {
				classArray[x] = '';
				break;
			}
		}

		el.className = this.privateCreateClassString(classArray);
	}

}; // end css

//	This javascript tags file downloads and external links in Google Analytics.
//	You need to be using the Google Analytics New Tracking Code (ga.js) 
//	for this script to work.
//	To use, place this file on all pages just above the Google Analytics tracking code.
//	All outbound links and links to non-html files should now be automatically tracked.
//
//	This script has been provided by Goodwebpractices.com
//	Thanks to ShoreTel, MerryMan and Colm McBarron
//
//	www.goodwebpractices.com
//	VKI has made changes as indicated below.								

function trackMailto(evnt) {

	var e = (evnt.srcElement) ? evnt.srcElement : this;
	while (e.tagName != "A") {
		e = e.parentNode;
	}
	var email = e.href.substring(7);
	
	var pageTracker = _gat._getTrackerByName();
    pageTracker._trackEvent('Mailto Links', email);
	
	return true;
}

function trackDownload(evnt) {

	var e = (evnt.srcElement) ? evnt.srcElement : this;
	while (e.tagName != "A") {
		e = e.parentNode;
	}
	var lnk = (e.pathname.charAt(0) == "/") ? e.pathname : "/" + e.pathname;
	
	var pageTracker = _gat._getTrackerByName();
    pageTracker._trackEvent('Downloads', lnk);
	
    setTimeout('document.location = "' + lnk + '"', 100);
	
	return false;
}

function trackExternalLinks(evnt) {

	var e = (evnt.srcElement) ? evnt.srcElement : this;
	while (e.tagName != "A") {
		e = e.parentNode;
	}
	var lnk = e.href;
	
	var pageTracker = _gat._getTrackerByName();
    pageTracker._trackEvent('External Links', lnk);
	
    setTimeout('document.location = "' + lnk + '"', 100);
	
	return false;
}

function trackLinkInit() {

	if (document.getElementsByTagName) {
		// Initialize external link handlers
		var hrefs = document.getElementsByTagName("a");
		for (var l = 0; l < hrefs.length; l++) {
			// try {} catch{} block added by erikvold VKI
			try {
				//protocol, host, hostname, port, pathname, search, hash
				if (hrefs[l].protocol == "mailto:") {
					addEvent(hrefs[l], "click", trackMailto);
				} else if (hrefs[l].hostname == location.host) {
					var path = hrefs[l].pathname + hrefs[l].search;
					var isDoc = path.match(/\.(?:doc|eps|jpg|png|svg|xls|ppt|pdf|xls|zip|txt|vsd|vxd|js|css|rar|exe|wma|mov|avi|wmv|mp3)($|\&|\?)/);
					if (isDoc) {
						addEvent(hrefs[l], "click", trackDownload);
					}
				} else if (!hrefs[l].href.match(/^javascript:/) && hrefs[l].hostname != '') {
					addEvent(hrefs[l], "click", trackExternalLinks);
					css.addClassToElement(hrefs[l], 'extlink');
				}
			} catch (e) {
				continue;
			}
		}
	}
}

addEvent(window, 'load', function () {
	trackLinkInit();
});