CSS Transparency Settings for All Browsers

.transparent_class {
opacity: 0.5; /* the standards compliant attribute that all browsers should recognize, but… */
filter:alpha(opacity=50); /* for IE */
-khtml-opacity: 0.5; /* for old Safari (1.x) */
-moz-opacity:0.5; /* for old skool Netscape Navigator */
}

(via)

Plan B: Remote Scripting With IFRAMEs

I have plans to apply AJAX to our library catalog but I’m running into a problem where I can’t do XMLHttpRequest events to servers other than the one I loaded the main webpage from. Mozilla calls it the “same origin policy,” everyone else calls it a cross-domain script exclusion, or something like that.
Some Mozilla folks [...]