css修改图片对比度，饱和度，灰度

var saturate = 100, contrast = 100, grayscale = 0, max = 100, grad = 1 ;

//saturate:饱和度（默认值100，越大越饱和），contrast:对比度（默认值100，越大越对比），grayscale：灰度（默认0，越大灰色程度比较深）
function setImginfo(imgid) {
        $("#" + imgid).css({
            "-webkit-filter": "grayscale(" + grayscale + "%) contrast(" + contrast + "%) saturate(" + saturate + "%)",
            "-moz-filter": "grayscale(" + grayscale + "%) contrast(" + contrast + "%) saturate(" + saturate + "%)",
            "-ms-filter": "grayscale(" + grayscale + "%) contrast(" + contrast + "%) saturate(" + saturate + "%)",
            "filter": "grayscale(" + grayscale + "%) contrast(" + contrast + "%) saturate(" + saturate + "%)"
        });
    }