sfHover = function() {
	if( document.getElementById( 'mainMenu' ) ) {
		var sfEls = document.getElementById('mainMenu').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);