/* ADAPTED FROM: Lightbox JS: Fullsize Image Overlays by Lokesh Dhakar - http://www.huddletogether.com For more information on this script, visit: http://huddletogether.com/projects/lightbox/ Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/ (basically, do anything you want, just leave my name and link) NOTE: Altered by CB to create and display dark overlay only, with extraneous functions removed and relevant functions revised and renamed. Table of Contents ----------------- Configuration Functions - getPageHeight() -- (formerly getPageSize()) - showOverlay() -- (formerly showLightbox()) - hideOverlay() -- (formerly hideLightbox()) - initOverlay() -- (formerly initLightbox()) */ // // Configuration // // CB Note: requires #overlay section of lightbox.css added to our css // And image called overlay.png // Must be initialized by adding initOverlay() call to body onload. // // get PageHeight -- (formerly getPageSize) // Original function returned array with page width, height and window width, height // Core code from - quirksmode.org // Edit for Firefox by pHaez // CB altered (and renamed) to return page height only // and also added some Windows IE corrections // function getPageHeight(){ var yScroll; if (window.innerHeight && window.scrollMaxY) { yScroll = window.innerHeight + window.scrollMaxY; } else if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac yScroll = document.body.scrollHeight; } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari yScroll = document.body.offsetHeight; } var windowHeight; if (self.innerHeight) { // all except Explorer windowHeight = self.innerHeight; } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode windowHeight = document.documentElement.clientHeight; } else if (document.body) { // other Explorers windowHeight = document.body.clientHeight; } // CB added because IE 6.0 on Windows with XHTML 1.0 Transitional doctype is not working var newHeight = 0; if (document.documentElement && document.documentElement.scrollHeight) newHeight = document.documentElement.scrollHeight; if (newHeight > yScroll) yScroll = newHeight; // for small pages with total height less then height of the viewport if(yScroll < windowHeight) { pageHeight = windowHeight; } else { pageHeight = yScroll; } return pageHeight; } // // showOverlay -- (formerly showLightbox) // Displays overlay. // function showOverlay() { // prep objects var objOverlay = document.getElementById('overlay'); var objLoading = document.getElementById('ajaxload'); // get page height var pageHeight = getPageHeight(); // set height of Overlay to take up whole page and show objOverlay.style.height = (pageHeight + 'px'); objOverlay.style.display = 'block'; // display loading image objLoading.style.visibility = 'visible'; // new Effect.Appear('overlay', {duration : 0.5}); } // // hideOverlay -- (formerly hideLightbox) // Hides overlay. // function hideOverlay() { // get object objOverlay = document.getElementById('overlay'); // hide overlay objOverlay.style.display = 'none'; } // // initOverlay -- (formerly initLightbox) // Function should run on window load. // It inserts html markup at the top of the page which will be used as a // container for the overlay pattern. // function initOverlay() { if (!document.getElementsByTagName){ return; } // the rest of this code inserts html creating the overlay div as the first element after // // var objBody = document.getElementsByTagName("body").item(0); // create overlay div and hardcode some functional styles (aesthetic styles are in CSS file) var objOverlay = document.createElement("div"); objOverlay.setAttribute('id','overlay'); objOverlay.style.display = 'none'; objOverlay.style.position = 'absolute'; objOverlay.style.top = '0'; objOverlay.style.left = '0'; objOverlay.style.zIndex = '2'; objOverlay.style.width = '100%'; objBody.insertBefore(objOverlay, objBody.firstChild); }