menuHover = function() {
var sfEls = document.getElementById("navigation").getElementsByTagName("li");
for (var i=0; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
    this.className+=" sfhover";
  }
  sfEls[i].onmouseout=function() {
    this.className=this.className.replace(new RegExp("\\s?sfhover\\b"), "");
  }
}

var listItem = document.getElementById("navigation").getElementsByTagName('ul');
for(var i=0;i<listItem.length;i++) {
  listItem[i].onmouseover=function() {
    var changeStyle = this.parentNode.getElementsByTagName('a');
    changeStyle[0].className+=" active";
  }

  listItem[i].onmouseout=function() {
    var changeStyle = this.parentNode.getElementsByTagName('a');
    changeStyle[0].className=this.className.replace(new RegExp("\\s?active\\b"), "");
  }
}
}

function addEvent( obj, type, fn ) {
if ( obj.attachEvent ) {
  obj['e'+type+fn] = fn;
  obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
  obj.attachEvent( 'on'+type, obj[type+fn] );
} else
  obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
if ( obj.detachEvent ) {
obj.detachEvent( 'on'+type, obj[type+fn] );
obj[type+fn] = null;
} else
  obj.removeEventListener( type, fn, false );
}

addEvent(window, 'load', function () { menuHover('menu'); });