Variable scope - 2

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  • John Wood
    #1

    Variable scope - 2

    Can anybody explain why my variable imonline is still 1 even though my
    onError function has fired , value = 0 when printed by Javascript
    document.write at end. I thought that
    VAR imonline = 1
    should have given me a global variable
    TIA


    <HTML>

    <SCRIPT LANGUAGE="JavaS cript">
    var imonline = 1;
    function imageError(theI mage) {imonline=0; document.JWonli ne.src =
    "2_yellow.jpg"; }
    </script>
    </HEAD>

    <BODY BGCOLOR="#b5ccb 8">
    <H2><CENTER>I s the green button loaded 2</CENTER></H2>
    <!-- 2_greenx.jpg does not exist for this test -->
    <img name="JWonline" src="2_greenx.j pg" align=left border=0
    onError="imageE rror(this)"
    onAbort="imageE rror(this)">

    <p>Yellow button indicates offline<br>
    Green button indicates online

    <!-- since yellow button is on, so imonline should be 0 -->
    <SCRIPT LANGUAGE="JavaS cript">
    document.write( "<BR>online=",i monline);
    </script>

    </BODY>
    </HTML>

    John Wood
    Tags: None
    • Lasse Reichstein Nielsen
      #2
      Re: Variable scope - 2

      John Wood <john@lortim.de mon.co.uk> writes:
      [color=blue]
      > Can anybody explain why my variable imonline is still 1 even though my
      > onError function has fired[/color]

      No it hasn't. When your document.write is executed, the image is still
      being loaded (or waiting to fail loading). It will probably not finish
      loading/failing the image before the page has been fully processed.

      /L
      --
      Lasse Reichstein Nielsen - lrn@hotpop.com
      DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
      'Faith without judgement merely degrades the spirit divine.'

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