Javascr ipt 颜色梯度和渐变效果。关于颜色的效果一般就两个，颜色梯度变化和样式的颜色渐变，前者在ie中一般用滤镜实现。-Javascr ipt color gradient and the gradient effect. General effect on the color of the two, the color change and style gradient color transitions, ie in the former tends to be used in t