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Iterating through object collections Messages   Related Types This message was discovered on microsoft.public.dotnet.languages.jscript. Post a new message to this list... Mark Rae Hi, Is there any way in JavaScript to iterate through an object's properties to interrogate their values? I'm thinking specifically of the navigator object, the screen object, the window object and the document object. Something like: foreach(obj in screen.properties) { document.write(obj.name + " = " + obj.value) } Any assistance gratefully received. Mark Reply to this message...        Martin Honnen Mark Rae wrote: [Original message clipped] for (var property in window.screen) { document.write('<p>' + property + ': ' + window.screen[property] + '<\/p>'); } --     Martin Honnen     http://JavaScript.FAQTs.com/ Reply to this message...        Mark Rae "Martin Honnen" <Click here to reveal e-mail address> wrote in message news:%Click here to reveal e-mail address... [Original message clipped] Excellent! Thanks. Reply to this message...        Mark Rae "Martin Honnen" <Click here to reveal e-mail address> wrote in message news:%Click here to reveal e-mail address... [Original message clipped] Actually, when I came to try this, I couldn't get it to work. I replaced "for" with "foreach", but that didn't help... :-( Reply to this message...        Martin Honnen Mark Rae wrote: [Original message clipped] The code is correct, if you try that with Netscape for instance it shows you properties that you expect. The problem with for (var property in object) is that it enumerates all properties of the object that are _marked as being enumerable_ and there is no standard for screen specifying whether its properties should be marked as being enumerable. Thus if you run the code with IE/Win for instance and nothing shows up then it is because the IE implementors have decided to mark the properties of screen as being not enumerable. There is nothing you can do about that with your code, but of course IE's object model is well documented so look into the SDK documentation first for the properties it defines for an object. --     Martin Honnen     http://JavaScript.FAQTs.com/ Reply to this message...        Mark Rae "Martin Honnen" <Click here to reveal e-mail address> wrote in message news:uLuq%Click here to reveal e-mail address... [Original message clipped] OK - thanks. Reply to this message...     Ad MBR BootFX Best-of-breed application framework for .NET projects, developed by Matthew Baxter-Reynolds and MBR IT

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