Open the image with Adobe Acrobat 9 Pro. In the Advanced Tab click on Print Production -> Preflight. Open the menu for PDF fixups by clicking on the triangle next to it and choose Convert to grayscale.
You can easily submit data in an html form via jQuery's $.post. But you need to do a little more to upload a file. I suggest the jQuery Form Plugin . Here is the HTML form: <html> <head> <title>Title</title> </head> <body> <form action="/test.cgi" enctype="multipart/form-data" method="post"> <input name="myFile" type="file" /> <div id="results"> </div> </form> </body> </html> This is the Javascript file myFrom.js: $(document).ready(function() { $('form').ajaxForm( { beforeSubmit: function() { $('#results').html('Submitting...'); }, success: function(data) { var $out = $('#results'); $out.html('Your results:'); $out.append('<div><pre>'+ data +'</pre></div>');
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