====== CSS - Opacity ======

<code css>
-khtml-opacity: .5;  // old safari
-moz-opacity: .5;  // old firefox
-ms-filter: alpha(opacity=50);  // new ie
-ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=50);  // new ie
filter: alpha(opacity=50);  // old ie
opacity: 0.5;  // modern gecko and webkit
</code>

----


<WRAP info>
**NOTE:**  Most old browsers are not used anymore, so this could be simplified to only:

<code css>
filter: alpha(opacity=50);
opacity: 0.5;
</code>

</WRAP>