function suckerfish(type, tag, parentId) {    
	if (window.attachEvent) {    
		window.attachEvent("onload", function() {    
			var sfEls = (parentId==null)?document.getElementsByTagName(tag):document.getElementById(parentId).getElementsByTagName(tag);    
			type(sfEls);    
			});    
		}    
}
sfFocus = function(sfEls) {    
	for (var i=0; i<sfEls.length; i++) {    
		sfEls[i].onfocus=function() {    
			this.className+=" sffocus";    
		}    
	sfEls[i].onblur=function() {    
		this.className=this.className.replace(new RegExp(" sffocus\\b"), "");    
		}    
	}    
}    
suckerfish(sfFocus, "INPUT");    
suckerfish(sfFocus, "TEXTAREA");