Need to make label control message not visible when focus is set in a text box control

I have some edit controls on a web form. When a "save" button is pressed
I display a message with a label control saying that the information has been saved.

I want the lable control message to no longer be visible once the app user (Sets focus) moves the mouse cursor
to an edit control box.   How can capture the event of focus being set in one of my text boxes, and then trigger
some code to make my label control no longer visible? (Label1.Visible=false)

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