function clearField(e){
			if(first_name.value==""){first_name.value="First name"}
			if(last_name.value==""){last_name.value="Last name"}
			if(email_address.value==""){email_address.value="Email address"}
			if(e.value == "First name" || e.value == "Last name" || e.value == "Email address"){e.value="";}
			}