H. Rietschels Lehrbuch der Heiz- und Lüftungstechnik

') var buybox = document.querySelector("[data-id=id_"+ timestamp +"]").parentNode var buyboxMaxSingleColumnWidth = 480 ;[].slice.call(buybox.querySelectorAll(".buying-option")).forEach(initCollapsibles) function initCollapsibles(buyingOption, index) { var toggle = buyingOption.querySelector(".buying-option-price") buyingOption.classList.remove("expanded") var form = buyingOption.querySelector(".buying-option-form") var priceInfo = buyingOption.querySelector(".price-info") if (toggle && form && priceInfo) { toggle.setAttribute("role", "button") toggle.setAttribute("tabindex", "0") toggle.addEventListener("click", function (event) { var expandedBuyingOptions = buybox.querySelectorAll(".buying-option.expanded") var buyboxWidth = buybox.offsetWidth ;[].slice.call(expandedBuyingOptions).forEach(function(option) { if (buyboxWidth -1 ;[].slice.call(buybox.querySelectorAll(".buying-option")).forEach(function (option, index) { var toggle = option.querySelector(".buying-option-price") var form = option.querySelector(".buying-option-form") var priceInfo = option.querySelector(".price-info") if (allOptionsInitiallyCollapsed || narrowBuyboxArea && index > 0) { toggle.setAttribute("aria-expanded", "false") form.hidden = "hidden" priceInfo.hidden = "hidden" } else { toggle.click() } }) } initialStateOpen() if (window.buyboxInitialised) return window.buyboxInitialised = true initKeyControls() })()