Element.implement({
    clearFocusResetBlur: function(attr){
        var valueString = this.get(attr);
        this.addEvents({
            'focus': function(){
                if( this.get('value') == valueString ) this.set('value','');
            },
            'blur': function(){
                if( this.get('value') == "" ) this.set('value',valueString);
            }
        });
    }

});
window.addEvent("domready", function(){
   $('ctrl_1').clearFocusResetBlur('value'); 
});