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I have a project that has a schedule calendar in which this calendar has a table with several square and I must change the color of these squares with some colors corresponding to a status and I must return this status of back to the changed database I thought to do where the user clicks on the square opens a color palette with the change of color and each color is related to a status but do not know how to start
the calendar is equal to the image below it is in excel I want to transfer it there in code to web 
Bruno, it is possible to do using click events and ajax requests. Tip study more about Jquery, the library does all this and more.
– Fabricio
but I can use this event on top of a table because I made one with <th> and <td> but it didn’t work out very well
– Bruno Albuquerque