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<script>

function addCounter(formName, formId) {
  var taElem = AJS.$('#' + formId).find('#i_ta');
  if (!taElem.hasClass('cfcounter')) {
   taElem.addClass('cfcounter');
   taElem.after('<div id="i_taCharNum"><>10 characters left</div>');


   taElem.on("input", function(){
    var maxlength = 10;
    var currentLength = AJS.$(this).val().length;

    if( currentLength >= maxlength ){
        AJS.$('#i_taCharNum').valhtml("0 chars left");
    }else{
        AJS.$('#i_taCharNum').valhtml(maxlength - currentLength + " chars left");
    }
});


  }
}


</script>