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 doClick(buttonId, e)
{
    var key;
     if(window.event)
          key = window.event.keyCode;       //IE
     else
          key = e.which;                    //firefox   
    if (key == 13)
    {            
        var btn = document.getElementById(buttonId);
        if (btn != null)
        {             
            btn.click();
            event.keyCode = 0
        }
    }
}