/* Smooth scrollingChanges links that link to other parts of this page to scrollsmoothly to those links rather than jump to them directly, whichcan be a little disorienting.sil, http://www.kryogenix.org/v1.0 2003-11-11v1.1 2005-06-16 wrap it up in an object*/var ss = {fixAllLinks: function() {// Get a list of all links in the pagevar allLinks = document.getElementsByTagName('a');// Walk through the listfor (var i=0;i<allLinks.length;i++) {var lnk = allLinks[i];if ((lnk.href && lnk.href.indexOf('#') != -1) && ( (lnk.pathname == location.pathname) ||('/'+lnk.pathname == location.pathname) ) && (lnk.search == location.search)) {// If the link is internal to the page (begins in #)// then attach the smoothScroll function as an onclick// event handlerss.addEvent(lnk,'click',ss.smoothScroll);}}},smoothScroll: function(e) {// This is an event handler; get the clicked on element,// in a cross-browser fashionif (window.event) {target = window.event.srcElement;} else if (e) {target = e.target;} else return;// Make sure that the target is an element, not a text node// within an elementif (target.nodeName.toLowerCase() != 'a') {target = target.parentNode;}// Paranoia; check this is an A tagif (target.nodeName.toLowerCase() != 'a') return;// Find the <a name> tag corresponding to this href// First strip off the hash (first character)anchor = target.hash.substr(1);// Now loop all A tags until we find one with that namevar allLinks = document.getElementsByTagName('a');var destinationLink = null;for (var i=0;i<allLinks.length;i++) {var lnk = allLinks[i];if (lnk.name && (lnk.name == anchor)) {destinationLink = lnk;break;}}// If we didn't find a destination, give up and let the browser do// its thingif (!destinationLink) return true;// Find the destination's positionvar destx = destinationLink.offsetLeft; var desty = destinationLink.offsetTop;var thisNode = destinationLink;while (thisNode.offsetParent && (thisNode.offsetParent != document.body)) {thisNode = thisNode.offsetParent;destx += thisNode.offsetLeft;desty += thisNode.offsetTop;}// Stop any current scrollingclearInterval(ss.INTERVAL);cypos = ss.getCurrentYPos();ss_stepsize = parseInt((desty-cypos)/ss.STEPS);ss.INTERVAL =setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10);// And stop the actual click happeningif (window.event) {window.event.cancelBubble = true;window.event.returnValue = false;}if (e && e.preventDefault && e.stopPropagation) {e.preventDefault();e.stopPropagation();}},scrollWindow: function(scramount,dest,anchor) {wascypos = ss.getCurrentYPos();isAbove = (wascypos < dest);window.scrollTo(0,wascypos + scramount);iscypos = ss.getCurrentYPos();isAboveNow = (iscypos < dest);if ((isAbove != isAboveNow) || (wascypos == iscypos)) {// if we've just scrolled past the destination, or// we haven't moved from the last scroll (i.e., we're at the// bottom of the page) then scroll exactly to the linkwindow.scrollTo(0,dest);// cancel the repeating timerclearInterval(ss.INTERVAL);// and jump to the link directly so the URL's rightlocation.hash = anchor;}},getCurrentYPos: function() {if (document.body && document.body.scrollTop)return document.body.scrollTop;if (document.documentElement && document.documentElement.scrollTop)return document.documentElement.scrollTop;if (window.pageYOffset)return window.pageYOffset;return 0;},addEvent: function(elm, evType, fn, useCapture) {// addEvent and removeEvent// cross-browser event handling for IE5+,  NS6 and Mozilla// By Scott Andrewif (elm.addEventListener){elm.addEventListener(evType, fn, useCapture);return true;} else if (elm.attachEvent){var r = elm.attachEvent("on"+evType, fn);return r;} else {alert("Handler could not be removed");}} }ss.STEPS = 25;ss.addEvent(window,"load",ss.fixAllLinks);