function checkData ()

                               {
                                if (document.signup.name_from.value == "") {
                                        alert("Please fill in your Name.")
                                        document.signup.name.focus()
                                        return false}
                                if (document.signup.phonenumber.value == "") {
                                        alert("Please fill in your Phone Number.")
                                        document.signup.phonenumber.focus()
                                        return false}
                                if (document.signup.email_from.value == "") {
                                        alert("Please fill in your Email Address.")
                                        document.signup.email_from.focus()
                                        return false;
    
                                }
                          
                        }