图片旋转js代码
<script type="text/javascript">
//图片旋转js代码(2013-5-27)
function rotateImage(imgId) {
imageToRotate = document.getElementById(imgId);
imageToRotate.style.filter = "progid:DXImageTransform.Microsoft.Matrix(sizingMethod=‘auto expand‘)";
rotate();
}
var imageToRotate;
var degreeToRotate = 0;
function rotate() {
var deg2radians = Math.PI * 180 / 360;
alert(deg2radians);
degreeToRotate++;
degreeToRotate = degreeToRotate % 360;
rad = degreeToRotate * deg2radians;
costheta = Math.cos(rad);
sintheta = Math.sin(rad);
imageToRotate.filters.item(0).M11 = costheta;
imageToRotate.filters.item(0).M12 = -sintheta;
imageToRotate.filters.item(0).M21 = sintheta;
imageToRotate.filters.item(0).M22 = costheta;
}
</script>
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