in reply to show a message only during the sleep time

well, keeping in mind you can't "unsend" or "erase" stuff send out to the browser, there are a few options..

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Re^2: show a message only during the sleep time
by cc (Beadle) on Jul 24, 2005 at 16:08 UTC
    hi davidrw

    I tried your trick,
    but I still have "pls wait !" on the screen and will not vanish:
    ................................... print "<body bgcolor='#c0c0d0'>\n"; print "<center>"; print "<p><br></p>"; print "<p><br></p>"; print "<div> pls wait ! </div>\n"; print "<SCRIPT LANGUAGE = \"JavaScript\">\n"; print "<!-- \n"; print "<body onLoad="...">\n"; print "// -->\n"; print "</SCRIPT>\n"; ...................................
      Well, you have write the "..." javascript -- the elipsis was just a place holder (and note that we want to add javascript code by using the <body onLoad=""> attribute, NOT embed the body tag inside script tags). Also, note the clunkiness of print statements for this.. (and this is pretty general advice) at the minimum, at least use here-docs, and also keep in mind a more robust solution like Template::Toolkit or HTML::Template. So, back to the problem at hand, this is what i was envisioning:
      print <<EOF; <html> <head> <title>ntop startup script</title> <STYLE TYPE='text/css'> h3 { color: red } a { text-decoration: none; font: bold 14pt/16pt Ariel, serif } a:hover { color: red } /* when mouse is over link */ </style> <script language="javascript"> function hideWaitMsg(){ var obj = getElementById('wait_msg_text'); obj.visible = false; } </script> </head> <body bgcolor='#c0c0d0' onLoad="hideWaitMsg()"> <center> <p><br></p> <p><br></p> <div id="wait_msg_text">pls wait, ntop will be started</div> EOF
      That's the basic setup .. note that i just guessed at the javascript code in the hideWaitMsg() function -- that part is left as an excercise for the reader.
        thanks a lot !

        but I get:
        Software error: Can't find string terminator "EOF" anywhere before EOF at /usr/local/w +ww/cgi-bin/ntop/ntop4.cgi line 20.
        my system has a problem with this line:
        print <<EOF;

        I have:
        # pkg_info | grep perl mod_perl2-2.0.1,2 Embeds a Perl interpreter in the Apache2 server perl-5.8.7 Practical Extraction and Report Language
        do I need to install additional perl module ?