opacity.md

opacity.md

.opacity{
    filter:alpha(opacity=50);       /* IE */
    -moz-opacity:0.5;              /* 老版Mozilla */
    khtml-opacity:0.5;              /* 老版Safari */
    opacity: 0.5;           /* 支持opacity的浏览器*/
}

object.filter = "alpha(opacity=" + opacity + ")";  /* IE */
object.MozOpacity = (opacity / 100);    /* 老版Mozilla */
object.KhtmlOpacity = (opacity / 100);    /* 老版Safari */
object.opacity = (opacity / 100);    /* 支持opacity的浏览器*/