A jQuery plugin that places a character limit on text inputs

jQuery.limitInput.js

/**
 * jQuery plugin that limits the number of characters that can be used in a text field.
 */
(function( $ ){
  $.fn.limitInput = function( limit ) {
    return this.each( function() {
      $(this).keypress( function() {
        if( $(this).val().length > limit ) {
          $(this).val( $(this).val().substring(0, limit) );
        }
      });
    });
  };
})( jQuery );

// Example usage
jQuery(document).ready(function($) {
  $('textarea').limitInput( 100 );
});