sticky operations in javascript
var siteHeader = document.getElementById('siteHeader'), siteNav = document.getElementById('siteNav'); window.onscroll = function() { if ( siteNav.offsetTop < document.documentElement.scrollTop + 26 || siteNav.offsetTop < document.body.scrollTop + 26) { siteHeader.setAttribute("class","sticky"); } else { siteHeader.setAttribute("class",""); } }