Validating a tax id
Your future success requires that you have the business insight today to make informed business decisions tomorrow. But getting the assistance you need should be available to all, not just to the wealthy.To learn more about the event object, take a look at JS.88.560– make sure to click on the button in the upper left corner to display the navigation pane if it’s not shown automatically.The third bulletpoint is a little difficult for me to solve in an elegant way.So, if the user enters ‘01234’ we should see an error message that would instruct the user about what type of data is valid for this field.To start, we create a text field and bring up the properties dialog for the field.Adobe provided a lot of infrastructure to do that with just a simple script.
// remove whitespaces, slashes & other unnecessary characters $tax Number = preg_replace("/[^0-9]/", "", $tax Number); // by default the taxnumber is correct $tax Number Valid = true; // taxnumber has to have exactly 11 digits if (strlen($tax Number) !
So, having a text field contain that error message might be a good idea.
There are other ways to highlight the field in question besides changing the text color, the border color or the fill color could be changed instead, or in addition, just make sure that you are not making the form impossible to read.
This is not always desired (for more complicated data, it will probably be much easier to take a look, correct that one typo and continue with the rest of the form), so my preference is actually to mark the field so that the user knows which field needs to be corrected, and have the validation script not report a validation error back to the field: Using this method has implications on the form submission process: The form no longer can verify that the data is correct, so the submission function needs to do another round of validation to see if any of the required fields are not correct (one way to do that is to test all relevant fields to see if the text color is using the error color, or we can use global variables to store the validation state).
Another thing I like to do is to display the validation error message on the form in an otherwise hidden field: The problem with our last solution is that if the user saves a partially filled form, and picks it up at a later time, that error message that popped up is long gone, and the only indication that there is something wrong with the form is the modified field color.
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