i love hidden iframes
recently, 've redicovered the value of hidden iframes in HTML documents. in a project i'm wrapping up at work, i use them as
target values for file downloads. that means i can have a target page that is a server script to handle the details of streaming a download file without actually navigating the browser away from the host page. another key advantage of using iframes as navigation targets is that you can return client script that pops a standard
alert box that contains status or other information.
here's an example: