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Disable Field From Sending Blank Value





I am working on the details page and have a dropdown from which the user can select a value. As it works now, when a user does not select a value in this dropdown and clicks submit the record is update with a blank value in this field. Is there a snippet of javascript that someone could provide that, when the submit button is clicked, will disable this dropdown if there is no value selected?



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Hi sb0502!


What Details Page do you use? Because it should show information about selected ID, say about a User. And if there is some value selected in the dropdown it should show that value on the Details Page. Right? Here is a question, how came that dropdown shows blank on the Details Page? 



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