I have a some dummy css for IE9 like this:

1. -ms-transform: rotate(0deg) skewX(0deg) skewY(0deg);

I'm trying to update it with this:

1. var skY = 10;
2. $('.vppersp').css({"-ms-transform": "rotate(-5deg) skewX(-5deg) skewY(-skY + 'deg')", 'letter-spacing': -lsp + 'px'})

The -ms-transform isn't being updated - what am I doing wrong?

Thanks,  Bill