Getting the cursor position of a keypress in JavaScript

keypress_position.js

$('alphaonly').keypress(function(e){
  // Convert the character code to a string
  var strIn = String.fromCharCode(e.charCode);
  
  // The current cursor position is stored as: e.target.selectionStart
  if(e.target.selectionStart == 0) {
    // Setup our pattern, excluding anything other than a-zA-Z
    var patt = /[a-zA-Z]/gi;
  } else {
    // Setup our pattern to allow alpha, spaces and dashes
    var patt = /[a-zA-Z\s\-]/gi;
  }
  
  // Return the test result
  return patt.test(strIn);
});