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File size control using JavaScript

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Sep 05.2003

Hello JavaScript masters.

I have a formmail script that allow users to upload certain files (You can only get to the form after authencating). Some times the files gets pretty big. So, I would like to limit the file size on the client-end rather than the backend wasting resources. Is this possible using JavaScript? Also, is it possible to use JavaScript to validate their mime type in the client-end as well.

Thanks.

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JavaScript

3 Comments(s) ↴

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@Alien_ManSep 06.2003 — Not sure if this is what you are looking for or not but it's the first thing that came to mind. You will however have to make a change to the code. mytest.txt will have to be replaced with a variable name that will be == to the file being uploaded.

<script type=”text/jscript” language=”JScript”>

<!--

function get()

{

var myObject, f;

// Create an instance of the FileSystemObject.

myObject = new ActiveXObject(“Scripting.FileSystemObject”);

f = myObject.GetFile(“c:tmpmyTest.txt”);

alert(“The file size is: “ + f.Size);

}

//-->

</script>
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@jennAshtonauthorSep 08.2003 — Thanks Alien man. I will try it out and let you know.

Jenn
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@Alien_ManSep 11.2003 — Your welcome just hope it was what you were looking for.
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