TextInputInitializer=Class.create({initialize:function(c,a,b){this._form=$(c);this._target=this._form[a];this._str=b;this._handler=function(d){this._target.clear();Event.stopObserving(this._target,"focus",this._handler)}.bindAsEventListener(this);if($F(this._target)===""){this._target.value=b;Event.observe(this._target,"focus",this._handler)}},sanitize:function(){if($F(this._target)==this._str){this._target.clear()}},clear:function(){this._target.clear()}});