Check field length, replace text and alert user

gistfile1.js

  $(document).ready(function() {
    // bind function to event
    $("#description").keyup(function()
    {
      // store value
      var description = $("#description").val();
      // check length
      if(description.length > 244)
      {
        // grab substr
        var replace = description.substr(0,244);
        // replace value
        $("#description").val(replace);
        // alert user
        alert("Maximum length for description reached.");
        // return yo
        return;
      }
    })
  });