var IE = '\v'=='v';
if(IE){
  document.getElementsByClassName = function(cl) {
    var retnode = [];
    var myclass = new RegExp('\\b'+cl+'\\b');
    var elem = this.getElementsByTagName('*');
    for (var i = 0; i < elem.length; i++) {
      var classes = elem[i].className;
      if (myclass.test(classes)) retnode.push(elem[i]);
    }
    return retnode;
  }; 
}

function menuActive(){
  var divs = document.getElementsByClassName("mainmenu");
  for(var d = 0; d < divs.length; d++){
    for(var a = 0; a < divs[d].childNodes.length; a++){
      if(divs[d].childNodes[a].tagName == "A"){
        if(divs[d].childNodes[a].href == document.location.href){
          divs[d].className = "mainmenu active";
          document.getElementById("mainmenu-sign").style.left = (divs[d].offsetLeft + (divs[d].offsetWidth / 2) - 7) + "px";
          document.getElementById("mainmenu-sign").style.display = "block";
        }
      }
    }
  }
}