Raised when the upload is about to be started.

Syntax

JavaScript CopyCode imageCopy Code
<script type="text/javascript" src="iuembed.js"></script>
<script type="text/javascript">
function ImageUploaderID_BeforeUpload() {
	//...your code...
}
var iu = new ImageUploaderWriter("ImageUploaderID", 610, 500);
//...params...
//...other event listeners...
iu.addEventListener("BeforeUpload", "ImageUploaderID_BeforeUpload");
//...other event listeners...
iu.writeHtml();
</script>

Returns

A boolean value (true or false). If event handler returns false (or zero), the upload is cancelled. Otherwise, upload begins immediately after the event handler finishes. This makes the event handler convenient for validating additional data provided by user.

See Also

Examples
Adding Watermarks
Uploading Additional Data with Files
Resizing and Rotating Images

Reference
AfterUpload Event