// get browser

var browser = false;
if(navigator.appName.indexOf("Explorer") != -1)      browser = 'MSIE';
else if(navigator.appName.indexOf("Netscape") != -1) browser = 'FIREFOX';
else if(navigator.appName.indexOf("Opera") != -1)    browser = 'OPERA';

// functions

sfHover = function() {
	var sfEls = document.getElementById("nav").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 dropdown() {
  var sfEls = document.getElementById("nav").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"), "");
    }
  }
}

function initDropdown(){
  if(browser == 'MSIE'){
    dropdown();
  }
}