i think that is not possible..
try this
HTML Code:
<form name="ul" method="post" action="http://rs288l3.rapidshare.com/cgi-bin/upload.cgi?rsuploadid=142804688778696723" enctype="multipart/form-data" onsubmit="document.ul.u.value='Please wait ...';document.ul.u.disabled=true">
<a href="#" onclick="switchfiles()">Multi-Upload</a> Choose your upload-datapath: Cogent <input name="mirror" onclick="document.ul.action='http://rs288cg.rapidshare.com/cgi-bin/upload.cgi?rsuploadid=142804688778696723';document.ul.u.value='Upload via Cogent'" type="radio">
Level(3) <input checked="checked" name="mirror" onclick="document.ul.action='http://rs288l3.rapidshare.com/cgi-bin/upload.cgi?rsuploadid=142804688778696723';document.ul.u.value='Upload via Level(3)'" type="radio">
Telia <input name="mirror" onclick="document.ul.action='http://rs288tl.rapidshare.com/cgi-bin/upload.cgi?rsuploadid=142804688778696723';document.ul.u.value='Upload via Telia'" type="radio"><br>
<div id="files"><input size="64" name="filecontent" type="file"> <input name="u" value="Upload!" type="submit"></div></form>
<table><tbody><tr><td>
<b>Upload-Limit: <font color="red">Unlimited!</font></b> (Max. <b><u>100 MB</u></b> per file! Split-Archives allowed!)<br>
<b>Download-Limit: <font color="red">Unlimited!</font></b> (Some files have 100.000 Downloads!)
</td></tr></tbody></table>