Jquery error setting style

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C#

jQuery

Hi all, I'm trying to set a style on a div element using JQuery but receive an error - this is a snippet of the code

var HourControl = $('#hour'); -- this is a div element
 // I get intellisense for setStyle
 HourControl.setStyle("-webkit-transform: rotate("90deg")");

// Throws this error
Object doesn't support property or method 'setStyle'
Does this error refer to setStyle or -webkit-transform ?

What I have tried:

Google and this code

var HourControl = $('#hour'); -- this is a div element
 // I get intellisense for setStyle
 HourControl.setStyle("-webkit-transform: rotate("90deg")");