Attach File Through mailto URI

Is it possible to attach a file using "mailto:" redirect in javascript?

Something like this:

document.location = "mailto:"+recipient+"?subject="+subject+"&body="+msg+"?attach="+"file1.zip";

No, you can not add an attachment to a message with the mailto: URL scheme.

mailto: only supports header values or text/plain content. See RFC 2368 for details.

You can create a custom email form, letting the user input a valid email-address if necessary and send this to the server. The server then can use a mail library to send an email including an attachment.

If you use PHP, you can easily do this using PHPMailer.