FileSize Image

Jul 23, 2005

I would like to measure the fileSize of the image (without uploading it - php).

I use:

var size_pic = document.getElementById('num1').childNodes[0].fileSize;
alert("size = " + size_pic);

which works on IE with one exception.

With a first time displayed image, the script displays a size= -1 The image is displayed on the first pass. The fileSize script is located after the img script.

var image_display=document.createElement('img');
image_display.src='file://' + field;
image_display.name = 'pict'
document.getElementById('num1').appendChild(image_ display);

The second pass is correct. size = 11479

Is this a cache problem? The first pass caches the file, the second pass reads the file?

I tried running - var size_pic =document.getElementById('num1').childNodes[0].fileSize; - twice but that made no difference.

Is there a work around for this problem.

Is there a better way to measure filesize in JavaScript?

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