jQuery(document).ready(function() { /* Snippet from http://stackoverflow.com/a/5918791 */ navigator.sayswho = (function(){ var N= navigator.appName, ua= navigator.userAgent, tem; var M= ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i); if(M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1]; M= M? [M[1], M[2]]: [N, navigator.appVersion,'-?']; return M; })(); var headerOffset = jQuery(".main-header").height(), blockMenu = jQuery(".block-menu"), nameNavigator = navigator.sayswho[0]; if (nameNavigator == "Chrome") { var bodyelem = jQuery("body"); } else if (nameNavigator == "Firefox") { var bodyelem = jQuery("body, html"); } else if (nameNavigator == "Safari") { var bodyelem = jQuery(document); } else if (nameNavigator == "MSIE") { var bodyelem = jQuery(window); } jQuery(window).scroll(function () { if (bodyelem.scrollTop() >= headerOffset) { blockMenu.addClass("is-mini").slideDown("slow"); } else { blockMenu.removeClass("is-mini"); } }); });