Dynamically setting xAxis rotation in high charts API

Using the below option in Chart I am able to set label rotation angle for Xaxis,

xAxis: {
    labels: {
        rotation: 90
    }
},

I would like to change the xAxis rotation dynamically(say on a开发者_JAVA百科 button click for a particular chart type). Is there any option to do that?

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This is working for me :

chart.xAxis[0].update({labels:{rotation:rotationValue}});

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Try something like this, I am not sure that it will work.

chart.xAxis[0].options.labels.rotation = 0;
chart.redraw();