js操作css

-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7));
如何用js操作呢，
dom.style.webkitLinearGradient = '(bottom,rgba(0,0,0,0),rgba(0,0,0,.7))';  不对
dom.style.webkitLineargradient = '(bottom,rgba(0,0,0,0),rgba(0,0,0,.7))';  也不对

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linear-gradient是一个颜色值，不是属性，你应该在CSS中这样写比如说background:-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7));，JS中dom.style.background="-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7))";

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dom.style.background='-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7))'

这样，你见过css那样写的吗

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'-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7))'这一整个字符串是一个属性值，所以使用dom操作的话应该是这样：

dom.style.属性名 = '-webkit-linear-gradient( bottom,rgba(0,0,0,0),rgba(0,0,0,.7))';