How can i give transparency effect in CSS?

css

Solution

50% opacity IE:

filter: alpha(opacity = 50);

50% opacity other browsers:

opacity: .5;

Problem

I am using an image in background of my web page. Now when i uses a table in frontend, i want it to have some transparency effect. ? How can i do that. ``` .semiTransparent { filter: alpha(opacity = 50); opacity: .5; } ``` this code is not working in CSS file

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