Redirect After Download

My objective is to redirect to another web page after download is
complete.

I have an activeX called to download a few dlls using the following
code

document.writeln(' <OBJECT ID="MQC" ');
document.writeln(' CLASSID="CLSID:98c53984-8bf8-4d11-9b1c-c324fca9ca"
');
document.writeln(' CODEBASE="test.ocx#Version=9,1,0,4359"');
document.writeln(' WIDTH=100% ');
document.writeln(' HEIGHT=100% >');
document.writeln(' <PARAM NAME="DomainPassword" value=""');
document.writeln(' <PARAM NAME="RootURL" value="' + getTdRootURL()
+'"');
document.writeln(' </OBJECT>');

I tried redirecting in the onLoad event of the form but doesn't work. I
suppose it redirects as soon as the activeX is loaded and not when it
has finished its download.