Hi! I am attempting to modify a lightbox script to support exiting the lightbox using the "esc" key, instead of "x". I am not too familiar with javascript/keycodes, so any help would be appreciated!

Code:
var musicPlayer = ""; var fileLoadingImage = "loading.gif"; var fileBottomNavCloseImage1 = "close1.gif"; var fileBottomNavCloseImage2 = "close2.gif"; var resizeSpeed = 8; var borderSize = 10; var slideShowWidth = 250; var slideShowHeight = 150; var SlideShowStartImage = "start.gif"; var SlideShowStopImage = "stop.gif"; var slideshow = 0; var foreverLoop = 1; var loopInterval = 3500; var resize = 0; var imageArray = new Array; var activeImage; if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 0.15; var so = null; var objSlideShowImage; var objLightboxImage; var objImageDataContainer; var keyPressed = false; var slideshowMusic = null; var firstTime = 1; var saveSlideshow; var saveForeverLoop; var saveLoopInterval; var saveSlideShowWidth; var saveSlideShowHeight; Object.extend(Element, { getWidth: function(element) { element = $(element); return element.offsetWidth;}, setWidth: function(element,w) { element = $(element); element.style.width = w +"px";}, setHeight: function(element,h) { element = $(element); element.style.height = h +"px";}, setTop: function(element,t) { element = $(element); element.style.top = t +"px";}, setSrc: function(element,src) { element = $(element); element.src = src;}, setHref: function(element,href) { element = $(element); element.href = href;}, setInnerHTML: function(element,content) { element = $(element); element.innerHTML = content;}
}); Array.prototype.removeDuplicates = function () { for(i = 1; i < this.length; i++){ if(this[i][0] == this[i-1][0]){ this.splice(i,1);}
}
}; Array.prototype.empty = function () { for(i = 0; i <= this.length; i++){ this.shift();}
}; var Lightbox = Class.create(); Lightbox.prototype = { initialize: function() { if (!document.getElementsByTagName){ return;}
var anchors = document.getElementsByTagName('area'); for (var i=0; i<anchors.length; i++){ var anchor = anchors[i]; var relAttribute = String(anchor.getAttribute('rel')); if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){ anchor.onclick = function () {myLightbox.start(this); return false;};}
}
var objBody = document.getElementsByTagName("body").item(0); var objOverlay = document.createElement("div"); objOverlay.setAttribute('id','overlay'); objOverlay.style.display = 'none'; objOverlay.onclick = function() { myLightbox.end(); return false;}; objBody.appendChild(objOverlay); var objLightbox = document.createElement("div"); objLightbox.setAttribute('id','lightbox'); objLightbox.style.display = 'none'; objBody.appendChild(objLightbox); var objOuterImageContainer = document.createElement("div"); objOuterImageContainer.setAttribute('id','outerImageContainer'); objLightbox.appendChild(objOuterImageContainer); var objImageContainer = document.createElement("div"); objImageContainer.setAttribute('id','imageContainer'); objOuterImageContainer.appendChild(objImageContainer); objLightboxImage = document.createElement("img"); objLightboxImage.setAttribute('id','lightboxImage'); objLightboxImage.setAttribute('width',''); objLightboxImage.setAttribute('height',''); objLightboxImage.setAttribute('galleryimg','no'); objLightboxImage.setAttribute('oncontextmenu','return false;'); objLightboxImage.setAttribute('onmousedown','return false;'); objLightboxImage.setAttribute('onmousemove','return false;'); objImageContainer.appendChild(objLightboxImage); var objHoverNav = document.createElement("div"); objHoverNav.setAttribute('id','hoverNav'); objImageContainer.appendChild(objHoverNav); var objPrevLink = document.createElement("a"); objPrevLink.setAttribute('id','prevLink'); objPrevLink.setAttribute('href','#'); objPrevLink.setAttribute('onFocus', 'if (this.blur) this.blur()'); objHoverNav.appendChild(objPrevLink); var objNextLink = document.createElement("a"); objNextLink.setAttribute('id','nextLink'); objNextLink.setAttribute('href','#'); objNextLink.setAttribute('onFocus', 'if (this.blur) this.blur()'); objHoverNav.appendChild(objNextLink); var objLoading = document.createElement("div"); objLoading.setAttribute('id','loading'); objImageContainer.appendChild(objLoading); var objLoadingLink = document.createElement("a"); objLoadingLink.setAttribute('id','loadingLink'); objLoadingLink.setAttribute('href','#'); objLoadingLink.setAttribute('onFocus', 'if (this.blur) this.blur()'); objLoadingLink.onclick = function() { myLightbox.end(); return false;}; objLoading.appendChild(objLoadingLink); var objLoadingImage = document.createElement("img"); objLoadingImage.setAttribute('src', fileLoadingImage); objLoadingLink.appendChild(objLoadingImage); objImageDataContainer = document.createElement("div"); objImageDataContainer.setAttribute('id','imageDataContainer'); objImageDataContainer.className = 'clearfix'; objLightbox.appendChild(objImageDataContainer); var objImageData = document.createElement("div"); objImageData.setAttribute('id','imageData'); objImageDataContainer.appendChild(objImageData); var objImageDetails = document.createElement("div"); objImageDetails.setAttribute('id','imageDetails'); objImageData.appendChild(objImageDetails); var objCaption = document.createElement("span"); objCaption.setAttribute('id','caption'); objCaption.setAttribute('align','left'); objImageDetails.appendChild(objCaption); var objNumberDisplay = document.createElement("span"); objNumberDisplay.setAttribute('align','left'); objNumberDisplay.setAttribute('id','numberDisplay'); objImageDetails.appendChild(objNumberDisplay); var objBottomNav = document.createElement("div"); objBottomNav.setAttribute('id','bottomNav'); objImageData.appendChild(objBottomNav); var objBottomNavCloseLink = document.createElement("a"); objBottomNavCloseLink.setAttribute('id','bottomNavClose'); objBottomNavCloseLink.setAttribute('href','#'); objBottomNavCloseLink.setAttribute('onFocus', 'if (this.blur) this.blur()'); objBottomNavCloseLink.onclick = function() { myLightbox.end(); window.clearInterval(chid); history.go(-1); return false;}; objBottomNavCloseLink.onmouseover = function () { objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage2);}; objBottomNavCloseLink.onmouseout = function () { objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage1);}; objBottomNav.appendChild(objBottomNavCloseLink); var objBottomNavCloseImage = document.createElement("img"); objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage1); objBottomNavCloseImage.setAttribute('align', 'right'); objBottomNavCloseImage.setAttribute('name', 'close'); objBottomNavCloseImage.setAttribute('height', '11'); objBottomNavCloseImage.setAttribute('width', '48'); objBottomNavCloseLink.appendChild(objBottomNavCloseImage); var objSlideShowLink = document.createElement("a"); objSlideShowLink.setAttribute('id','slideshowLink'); objSlideShowLink.setAttribute('href','#'); objSlideShowLink.setAttribute('title','Slideshow'); objSlideShowLink.setAttribute('onFocus', 'if (this.blur) this.blur()'); objSlideShowLink.onclick = function() { myLightbox.toggleSlideShow(); return false;}; objBottomNav.appendChild(objSlideShowLink); objSlideShowImage = document.createElement("img"); objSlideShowImage.setAttribute('src', SlideShowStartImage); objSlideShowImage.setAttribute('height', '14'); objSlideShowImage.setAttribute('width', '53'); objSlideShowLink.appendChild(objSlideShowImage); var objFlashPlayer = document.createElement("div"); objFlashPlayer.setAttribute('id','flashPlayer'); objBottomNav.appendChild(objFlashPlayer);}, start: function(imageLink) { firstTime = 1; saveSlideshow = slideshow; saveForeverLoop = foreverLoop; saveLoopInterval = loopInterval; saveSlideShowWidth = slideShowWidth; saveSlideShowHeight = slideShowHeight; hideSelectBoxes(); var arrayPageSize = getPageSize(); Element.setHeight('overlay', arrayPageSize[1]); Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.8 }); imageArray = []; imageNum = 0; if (!document.getElementsByTagName){ return;}
var anchors = document.getElementsByTagName('area'); if((imageLink.getAttribute('rel') == 'lightbox')){ imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('caption')));} else { for (var i=0; i<anchors.length; i++){ var anchor = anchors[i]; if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){ imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('caption'))); if (imageArray.length == 1) { slideshowMusic = anchor.getAttribute('music'); if (slideshowMusic == null) { Element.hide('flashPlayer');} else
{ Element.show('flashPlayer');}
var startSlideshow = anchor.getAttribute('startslideshow'); if (startSlideshow != null) { if (startSlideshow == "false") slideshow = 0;}
var forever = anchor.getAttribute('forever'); if (forever != null) { if (forever == "true") foreverLoop = 1; else foreverLoop = 0;}
var slideDuration = anchor.getAttribute('slideDuration'); if (slideDuration != null) { loopInterval = slideDuration * 1000;}
var width = anchor.getAttribute('slideshowwidth'); if (width != null) { slideShowWidth = width *1;}
var height = anchor.getAttribute('slideshowheight'); if (height != null) { slideShowHeight = height *1;}
}
}
}
imageArray.removeDuplicates(); while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
}
this.changeImageByTimer(imageNum);}, showLightBox: function() { var arrayPageSize = getPageSize(); var arrayPageScroll = getPageScroll(); var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15); Element.setTop('lightbox', lightboxTop); Element.show('lightbox');}, changeImageByTimer: function(imageNum) { activeImage = imageNum; this.imageTimer = setTimeout(function() { this.showLightBox(); this.changeImage(activeImage);}.bind(this), 10);}, changeImage: function(imageNum) { activeImage = imageNum; Element.show('loading'); Element.hide('lightboxImage'); Element.hide('hoverNav'); Element.hide('prevLink'); Element.hide('nextLink'); Element.hide('imageDataContainer'); Element.hide('numberDisplay'); Element.hide('slideshowLink'); imgPreloader = new Image(); imgPreloader.onload=function(){ Element.setSrc('lightboxImage', imageArray[activeImage][0]); objLightboxImage.setAttribute('width', imgPreloader.width); objLightboxImage.setAttribute('height', imgPreloader.height); if ((imageArray.length > 1) && (slideShowWidth != -1 || slideShowHeight != -1)) { if ( (slideShowWidth >= imgPreloader.width) &&
(slideShowHeight >= imgPreloader.height) ) { myLightbox.resizeImageContainer(slideShowWidth, slideShowHeight);} else { myLightbox.resizeImageAndContainer(imgPreloader.width, imgPreloader.height);}
} else { myLightbox.resizeImageAndContainer(imgPreloader.width, imgPreloader.height);}
}
imgPreloader.src = imageArray[activeImage][0];}, resizeImageAndContainer: function(imgWidth, imgHeight) { if(resize == 1) { useableWidth = 0.9; useableHeight = 0.8; var arrayPageSize = getPageSize(); windowWidth = arrayPageSize[2]; windowHeight = arrayPageSize[3]; scaleX = 1; scaleY = 1; if ( imgWidth > windowWidth * useableWidth ) scaleX = (windowWidth * useableWidth) / imgWidth; if ( imgHeight > windowHeight * useableHeight ) scaleY = (windowHeight * useableHeight) / imgHeight; scale = Math.min( scaleX, scaleY ); imgWidth *= scale; imgHeight *= scale; objLightboxImage.setAttribute('width', imgWidth); objLightboxImage.setAttribute('height', imgHeight);}
this.resizeImageContainer(imgWidth, imgHeight);}, resizeImageContainer: function( imgWidth, imgHeight) { this.wCur = Element.getWidth('outerImageContainer'); this.hCur = Element.getHeight('outerImageContainer'); this.xScale = ((imgWidth + (borderSize * 2)) / this.wCur) * 100; this.yScale = ((imgHeight + (borderSize * 2)) / this.hCur) * 100; wDiff = (this.wCur - borderSize * 2) - imgWidth; hDiff = (this.hCur - borderSize * 2) - imgHeight; if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'});}
if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration});}
if((hDiff == 0) && (wDiff == 0)){ if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250);} else { pause(100);}
}
Element.setHeight('prevLink', imgHeight); Element.setHeight('nextLink', imgHeight); Element.setWidth( 'imageDataContainer', imgWidth + (borderSize * 2)); this.showImage();}, showImage: function(){ Element.hide('loading'); new Effect.Appear('lightboxImage', { duration: 0.5, queue: 'end', afterFinish: function(){ myLightbox.updateDetails();} }); this.preloadNeighborImages();}, updateDetails: function() { Element.show('caption'); if (imageArray[activeImage][1] != '') { Element.setInnerHTML( 'caption', imageArray[activeImage][1]);} else { Element.setInnerHTML( 'caption', "&nbsp;");}
if(imageArray.length>1){ var ndhtml; Element.show('numberDisplay'); ndhtml=""+eval(activeImage+1)+" of "+imageArray.length; if(eval(activeImage+1)>1){ ndhtml="<a id='prevLink2'>Previous</a>&nbsp;&nbsp;-&nbsp;&nbsp;"+ndhtml;}
if(eval(activeImage+1)<imageArray.length){ ndhtml=ndhtml+"&nbsp;&nbsp;-&nbsp;&nbsp;<a id='nextLink2'>Next</a>";}
Element.setInnerHTML('numberDisplay',ndhtml);}
if (1 == 1) { new Effect.Parallel( [ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }), new Effect.Appear('imageDataContainer', { sync: true, duration: 1.0 }) ], { duration: 0.65, afterFinish: function() { myLightbox.updateNav();} } );} else { myLightbox.updateNav();}
if (imageArray.length > 1) { Element.show('flashPlayer'); Element.show('slideshowLink');}else { Element.hide('flashPlayer'); Element.hide('slideshowLink');}
if (slideshow == 1) { this.startSlideShow();}
}, updateNav: function() { Element.show('hoverNav'); if(activeImage != 0){ Element.show('prevLink'); document.getElementById('prevLink').onclick = function() { if (slideshow == 1) keyPressed = true; myLightbox.changeImage(activeImage - 1); return false;}
document.getElementById('prevLink2').onclick = function() { if (slideshow == 1) keyPressed = true; myLightbox.changeImage(activeImage - 1); return false;}
}
if(activeImage != (imageArray.length - 1)){ Element.show('nextLink'); document.getElementById('nextLink').onclick = function() { if (slideshow == 1) keyPressed = true; myLightbox.changeImage(activeImage + 1); return false;}
document.getElementById('nextLink2').onclick=function(){ if (slideshow == 1) keyPressed = true; myLightbox.changeImage(activeImage+1);return false;}
}
this.enableKeyboardNav(); if (firstTime == 1) { firstTime = 0; if (imageArray.length > 1 && slideshow == 1) this.showMusicPlayer(); if (slideshow == 1) this.playMusic();}
}, enableKeyboardNav: function() { document.onkeydown = this.keyboardAction;}, disableKeyboardNav: function() { document.onkeydown = '';}, keyboardAction: function(e) { if (e == null) { keycode = event.keyCode;} else { keycode = e.which;}
key = String.fromCharCode(keycode).toLowerCase(); if((key == 'x') || (key == 'o') || (key == 'c')){ myLightbox.end();} else if((keycode == 188) || (key == 'p') || (keycode == 37)){ if(activeImage != 0){ if (slideshow == 1) keyPressed = true; myLightbox.disableKeyboardNav(); myLightbox.changeImage(activeImage - 1);}
} else if((keycode == 190) || (key == 'n') || (keycode == 39)){ if(activeImage != (imageArray.length - 1)){ if (slideshow == 1) keyPressed = true; myLightbox.disableKeyboardNav(); myLightbox.changeImage(activeImage + 1);}
} else if(key == 's'){ myLightbox.toggleSlideShow();}
}, preloadNeighborImages: function(){ if((imageArray.length - 1) > activeImage){ preloadNextImage = new Image(); preloadNextImage.src = imageArray[activeImage + 1][0];}
if(activeImage > 0){ preloadPrevImage = new Image(); preloadPrevImage.src = imageArray[activeImage - 1][0];}
}, toggleSlideShow: function() { if(slideshow == 1) this.stopSlideShow(); else { if(activeImage == (imageArray.length-1)) { slideshow = 1; this.changeImage(0);} else { this.startSlideShow();}
}
}, startSlideShow: function() { slideshow = 1; objSlideShowImage.setAttribute('src', SlideShowStopImage); this.slideShowTimer = setTimeout(function() { if (keyPressed) { keyPressed = false; return;}
if(activeImage < (imageArray.length-1)) this.changeImage(activeImage + 1); else { if(foreverLoop) this.changeImage(0); else { slideshow = 0; objSlideShowImage.setAttribute('src', SlideShowStartImage);}
}
}.bind(this), loopInterval);}, stopSlideShow: function() { slideshow = 0; objSlideShowImage.setAttribute('src', SlideShowStartImage); if(this.slideShowTimer) { clearTimeout(this.slideShowTimer); this.slideShowTimer = null; Element.setInnerHTML('flashPlayer', '');}
}, end: function() { this.stopSlideShow(); this.disableKeyboardNav(); Element.hide('lightbox'); new Effect.Fade('overlay', { duration: 0.2}); showSelectBoxes(); slideshow = saveSlideshow; foreverLoop = saveForeverLoop; loopInterval = saveLoopInterval; slideShowWidth = saveSlideShowWidth; slideShowHeight = saveSlideShowHeight;}
}
function getPageScroll(){ var yScroll; if (self.pageYOffset) { yScroll = self.pageYOffset;} else if (document.documentElement && document.documentElement.scrollTop){ yScroll = document.documentElement.scrollTop;} else if (document.body) { yScroll = document.body.scrollTop;}
arrayPageScroll = new Array('',yScroll)
return arrayPageScroll;}
function getPageSize(){ var xScroll, yScroll; if (window.innerHeight && window.scrollMaxY) { xScroll = document.body.scrollWidth; yScroll = window.innerHeight + window.scrollMaxY;} else if (document.body.scrollHeight > document.body.offsetHeight){ xScroll = document.body.scrollWidth; yScroll = document.body.scrollHeight;} else { xScroll = document.body.offsetWidth; yScroll = document.body.offsetHeight;}
var windowWidth, windowHeight; if (self.innerHeight) { windowWidth = self.innerWidth; windowHeight = self.innerHeight;} else if (document.documentElement && document.documentElement.clientHeight) { windowWidth = document.documentElement.clientWidth; windowHeight = document.documentElement.clientHeight;} else if (document.body) { windowWidth = document.body.clientWidth; windowHeight = document.body.clientHeight;}
if(yScroll < windowHeight){ pageHeight = windowHeight;} else { pageHeight = yScroll;}
if(xScroll < windowWidth){ pageWidth = windowWidth;} else { pageWidth = xScroll;}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
return arrayPageSize;}
function getKey(e){ if (e == null) { keycode = event.keyCode;} else { keycode = e.which;}
key = String.fromCharCode(keycode).toLowerCase(); if(key == 'x'){ }
}
function listenKey () { document.onkeypress = getKey;}
function showSelectBoxes(){ selects = document.getElementsByTagName("select"); for (i = 0; i != selects.length; i++) { selects[i].style.visibility = "visible";}
}
function hideSelectBoxes(){ selects = document.getElementsByTagName("select"); for (i = 0; i != selects.length; i++) { selects[i].style.visibility = "hidden";}
}
function pause(numberMillis) { var now = new Date(); var exitTime = now.getTime() + numberMillis; while (true) { now = new Date(); if (now.getTime() > exitTime)
return;}
}
function initLightbox() { myLightbox = new Lightbox();}
function init() { if (arguments.callee.done) return; arguments.callee.done = true; if (_timer) { clearInterval(_timer); _timer = null;}
initLightbox();}; if (document.addEventListener) { document.addEventListener("DOMContentLoaded", init, false);}
if (/WebKit/i.test(navigator.userAgent)) { var _timer = setInterval(function() { if (/loaded|complete/.test(document.readyState)) { init();}
}, 10);}
window.onload = init;