webkitTransform with Jquery
===

<br />
when I use this code, everything works fine.<br />

    document.getElementById('cube').style.webkitTransform = "rotateX("+xAngle+"deg) rotateY("+yAngle+"deg)";

But,when I use this jQuerycode, it won't work.

    jQuery('cube').css('-webkit-transform', "rotateX("+xAngle+"deg) rotateY("+yAngle+"deg)" );

Where is the difference ?