// light up active navigation elements
function highlight_nav() {
  var navMainEls = document.getElementById("nav").getElementsByTagName("a");
  var footerEls = document.getElementById("footer").getElementsByTagName("a");
  var urlNoQueryString = location.href.replace(location.search,"");
  
  // this sets both nav and subnav els
  for (var i=0; i<navMainEls.length; i++) {
    if(navMainEls[i].href==location.href || navMainEls[i].href==urlNoQueryString) {
      //alert('found main nav match');
      navMainEls[i].className+=" on";
    }
  }
  for (var i=0; i<footerEls.length; i++) {
    if(footerEls[i].href==location.href || footerEls[i].href==urlNoQueryString) {
      //alert('found footer nav match');
      footerEls[i].className+=" on";
    }
  }
}
highlight_nav();