在https://developer.mozilla.org/En/CSS:-moz-opacity里说得很清楚了:
Note: Firefox 3.5 and later do not support -moz-opacity. By now, you should be using simply opacity.
现在都要改用opacity这个属性。
于是要设置一下透明度为60%的DIV就应该这样写了:
div.transp { /* make the div translucent */
opacity: 0.6; /* Firefox, Safari(WebKit), Opera)
filter: "alpha(opacity=60)"; /* IE 8 */
filter: alpha(opacity=60); /* IE 4-7 */
zoom: 1; /* needed in IE up to version 7, or set width or height to trigger "hasLayout" */