Dealing with the problem of notes details turning gray on web pages

1. In IE, if relative positioning is used, that is, <div style="background:url();position:relative;"></div>, the background image cannot be grayed out.

2. In Firefox or Google Chrome, if the className of an element is changed through js, the changed className style cannot be displayed because the js file directly adds the style to the element after the web page is loaded, resulting in the inability to switch normally.

The first solution is to use the code html { filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1); } in IE. It does not work in Firefox or other browsers.

I don't know the second solution either. In order to switch normally, I can only reset the div in this area, that is, not let it gray out. The code is as follows:

grayscale.reset(div);

Related information: https://www.jb51.net/article/23167.htm

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