Validity File Size Validation

gistfile1.js

// This depends on a feature in modern browser as described in:
// http://stackoverflow.com/questions/3717793/javascript-file-upload-size-validation


// Add file uploads to validity's element support:
$.validity.settings.elementSupport += ", :file";

// Create a validator for minimum file size (also requires the file):
// Using assert http://validity.thatscaptaintoyou.com/Demos/index.htm#Assert
$.fn.minFileSize = function(min) {
  return this
    .assert(
      function(fup) { return !!fup.files.length; }, 
      "You should select a file"
    )
    .assert(
      function(fup) { return fup.files[0].size >= min; },
      "The file is too small"
    );
};



// Now, in a validation session, can write...
var min = 10000;
$("#myFileUpload:file").minFileSize(min);