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From 2012.igem.org

function SDMenu(id) { if (!document.getElementById || !document.getElementsByTagName) return false; this.menu = document.getElementById(id); this.submenus = this.menu.getElementsByTagName("div"); this.remember = true; this.speed = 5; this.markCurrent = true; this.oneSmOnly = true; } SDMenu.prototype.init = function() { var mainInstance = this; for (var i = 0; i < this.submenus.length; i++) this.submenus[i].getElementsByTagName("span")[0].onclick = function() { mainInstance.toggleMenu(this.parentNode); }; if (this.markCurrent) { var links = this.menu.getElementsByTagName("a"); for (var i = 0; i < links.length; i++){ links[0].className="current";

links[i].onclick = function() { var link_t = document.getElementsByTagName("a"); for (var i = 0; i < link_t.length; i++){ if(link_t[i].className== "current"){ link_t[i].className=; } } this.className = "current"; } //if (links[i].href == sampleframe.location.href) { // links[i].className = "current"; // break; //} } } if (this.remember) { var regex = new RegExp("sdmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)"); var match = regex.exec(document.cookie); if (match) { var states = match[1].split(""); for (var i = 0; i < states.length; i++) this.submenus[i].className = (states[i] == 0 ? "collapsed" : ""); } } }; SDMenu.prototype.toggleMenu = function(submenu) { if (submenu.className == "collapsed") this.expandMenu(submenu); else this.collapseMenu(submenu); }; SDMenu.prototype.expandMenu = function(submenu) { var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight; var links = submenu.getElementsByTagName("a"); for (var i = 0; i < links.length; i++) fullHeight += links[i].offsetHeight; var moveBy = Math.round(this.speed * links.length);

var mainInstance = this; var intId = setInterval(function() { var curHeight = submenu.offsetHeight; var newHeight = curHeight + moveBy; if (newHeight < fullHeight) submenu.style.height = newHeight + "px"; else { clearInterval(intId); submenu.style.height = ""; submenu.className = ""; mainInstance.memorize(); } }, 30); this.collapseOthers(submenu); }; SDMenu.prototype.collapseMenu = function(submenu) { var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight; var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length); var mainInstance = this; var intId = setInterval(function() { var curHeight = submenu.offsetHeight; var newHeight = curHeight - moveBy; if (newHeight > minHeight) submenu.style.height = newHeight + "px"; else { clearInterval(intId); submenu.style.height = ""; submenu.className = "collapsed"; mainInstance.memorize(); } }, 30); }; SDMenu.prototype.collapseOthers = function(submenu) { if (this.oneSmOnly) { for (var i = 0; i < this.submenus.length; i++) if (this.submenus[i] != submenu && this.submenus[i].className != "collapsed") this.collapseMenu(this.submenus[i]); } }; SDMenu.prototype.expandAll = function() { var oldOneSmOnly = this.oneSmOnly; this.oneSmOnly = true; for (var i = 0; i < this.submenus.length; i++) if (this.submenus[i].className == "collapsed") this.expandMenu(this.submenus[i]); this.oneSmOnly = oldOneSmOnly; }; SDMenu.prototype.collapseAll = function() { for (var i = 0; i < this.submenus.length; i++) if (this.submenus[i].className != "collapsed") this.collapseMenu(this.submenus[i]); }; SDMenu.prototype.memorize = function() { if (this.remember) { var states = new Array(); for (var i = 0; i < this.submenus.length; i++) states.push(this.submenus[i].className == "collapsed" ? 0 : 1); var d = new Date(); d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000)); document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/"; } };