function isEmpty(field,comment) {
        var inputStr = field.value
        if (inputStr == "" || inputStr == null) {
                alert(comment+" field is empty!")
                field.focus()
                field.select()
                return false
        }
        return true
}

function afinal1() {

        var proceed = true

        proceed = isEmpty(document.form5.logon_name,"Login name")
        if (!proceed) return false

        proceed = isEmpty(document.form5.passwd1,"Password")
        if (!proceed) return false

}