how to tell the webbrowser that the file was completely sent?

Hi, i've got a little problem: the browser prints in the statusbar 'loading page' as long as the PHP-Script is working... the browser just begins to run my javascript, when it has finnished loading... is it possible to tell the webbrowser, that the webpage is fully transmitted, althought the script keeps on working? here is a more detailed description: i'm building up the page and sending the whole webpage to the webbrowser... now the php-script must do some synchrinizing work with my 2nd server and this can take up to 5 seconds... and that's where the normal internet user is expieriencing problems: the javascript menu doesn't startup until the webbrowser gets the signal, that the php script has finished its work... that's why the java-script menu needs up to 5 seconds until it get displayed... :( what can i do? thanks in advnace for any help... :) MFG Marco