(SOLVED) Howto perform justify center action on a parent element

Hey all!

I have the following code in the editor: <diashow></diashow> and I want to center the <diashow> tag by adding "text-align: center;" to the tag (just to center it in the editor, front-end is done differently and doesn't matter ;)). Does anyone has any ideas how I can apply that action on the tag from the commit function of the dropdown list in the diashow dialog?

I tried using diashowNode.getParent() to get the tag and apply the center action somehow, but that doens't do anything.

Any ideas? :)

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EDIT - SOLVED

I added this to the commit function of the align dropdown list and that did the job:

var command = editor.getCommand( 'justifyleft' );
command.exec();

if (this.getValue() == 'center') {
var command = editor.getCommand( 'justifycenter' );
command.exec();
}