<script type="text/javascript" charset="utf-8">    
  $(document).ready(function() {  
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Define the disallowed strings and allert text
    var disallowed = ['refused', 'none of your business', 'nunya'];
    var alertText = 'You have entered an invalid string!';
 
    // Interrupt the Next/Submit click
    $('#movenextbtn, #movesubmitbtn').bind('click', function () {
      var thisInput = $('input.text', thisQuestion);
      var thisVal = thisInput.val();
      thisInput.removeClass('disallowed-string');
 
      // Loop through all disallowed strings
      $(disallowed).each(function(i) {
        // If disallowed string found in input value
        if(new RegExp('\\b'+this+'\\b', 'i').test(thisVal) == true) {
          thisInput.addClass('disallowed-string'); // Add a class
          alert(alertText); // Pop up alert
          return false; // Exit the loop
        }
      });
 
      // Abort the Next/Submit if we found a disallowed string
      if(thisInput.hasClass('disallowed-string')) {
        return false;
      }
    });
 
  });
</script>

input.disallowed-string {
  background: pink;
  border: 1px solid red;
}

<script type="text/javascript" charset="utf-8">    
  $(document).ready(function() {  
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Define the disallowed strings and allert text
    var disallowed = ['refused', 'none of your business', 'nunya'];
    var alertText = 'You have entered an invalid string!';
    var alertText2 = 'You must enter more than 4 characters!';
 
    // Interrupt the Next/Submit click
    $('#movenextbtn, #movesubmitbtn').bind('click', function () {
      var thisInput = $('input.text', thisQuestion);
      var thisVal = thisInput.val();
      thisInput.removeClass('disallowed-string');
 
      if($.trim(thisVal).length < 5) {
        thisInput.addClass('disallowed-string'); // Add a class
        alert(alertText2); // Pop up alert
      }
      else { 
        // Loop through all disallowed strings
        $(disallowed).each(function(i) {
          // If disallowed string found in input value
          if(new RegExp('\\b'+this+'\\b', 'i').test(thisVal) == true) {
            thisInput.addClass('disallowed-string'); // Add a class
            alert(alertText); // Pop up alert
            return false; // Exit the loop
          }
        });
      }
 
      // Abort the Next/Submit if we found a disallowed string
      if(thisInput.hasClass('disallowed-string')) {
        return false;
      }
    });
 
  });
</script>

<style type="text/css">
body {
background-color: #434343;
background-image: url('/upload/surveys/362842/images/buildingbkgd.png');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: right; 
 
}</style>
<script type="text/javascript" charset="utf-8">    
  $(document).ready(function() {  
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Define the disallowed strings and alert text
    var disallowed = ['refused', 'none of your business', 'nunya'];
    var alertText = 'Please enter the name of the company you work for';
 
    // Interrupt the Next/Submit click
    $('#movenextbtn, #movesubmitbtn').bind('click', function() {
      var thisInput = $('input.text', thisQuestion);
      var thisVal = thisInput.val();
      thisInput.removeClass('disallowed-string');
 
      // Loop through all disallowed strings
      $(disallowed).each(function(i) {
        // If disallowed string found in input value
        if(new RegExp('\\b'+this+'\\b', 'i').test(thisVal) === true) {
          thisInput.addClass('disallowed-string'); // Add a class
          alert(alertText); // Pop up alert
          return false; // Exit the loop
        }
      });
 
      // Abort the Next/Submit if we found a disallowed string
      if(thisInput.hasClass('disallowed-string')) {
        return false;
      }
    });
 
  });
</script>What is the name of the company where you currently work?