Form Submission With Iframe?

user fills in a form (selects files for upload, writes a post, etc.) and submits it - without page reload she gets a response from server (error, unsupported file type, inappropriate language, success, etc.)I imagine first, submit-without-reload, part is done via the form.target property like this: - iframe is either created dynamically with JS createElement or statically. But in any case it should look something like this:

<iframe id="#iframe123456" name="#iframe123456"></iframe>

- form, also created either dynamically or statically:

<form action="process.php" target="#iframe123456">
<!-- inputs of various types -->
</from>

As for the response/result part, server dumps its reply into the targeted iframe, so I have three alternatives:- use iframe's onLoad (onReadyStateChange) event: attach a get_data() function to it.- frequently/manually poll iframe for data using setInterval(get_data, milliseconds). - inject some script into the server response that makes iframe itself call get_data() .how I can check if an iframe has data in it.I use the following script to get the iframe's inner document object (excerpt from get_data() fucntion ):

if ( iframe.contentDocument ){
doc = iframe.contentDocument;
}else if( iframe.contentWindow ){

[code]....