var showing = false;

$(document).ready(
	function(){
        $('.showFull').click(function() {
           $('.fullForm').slideToggle('slow');
		   showing =! showing
		
			if (showing) {
				$('.showFull').attr('value','no thanks... I will do this later.');
			} else {
				$('.showFull').attr('value','add more details');
			} 
		   

           return false;
        });			
    }
);