sfHover = function() {
  var sfEls = document.getElementById('p7PMnav').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(" sfhover\\b"), "");
    }
  }
  var sfEls = document.getElementById('left').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(" sfhover\\b"), "");
    }
  }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function show(el_id) {
	el = document.getElementById(el_id);
	el.style.display = 'block';
}

function hide(el_id) {
	el = document.getElementById(el_id);
	el.style.display = 'none';
}