JS - Validação de campo utilizando tooltip -bootstrap

gistfile1.txt

//Inserir o link para jQuery, js.bootstrap e css.bootstarp.
//O CSS exclusivo do tooltip está separado logo abaixo.

<textarea id='addItInfo'  rows='4' cols='65%' name='prf[info][nm_additionalItInfo]' data-toggle='tooltip' data-placement='left'>$nm_additionalItInfo</textarea>

if($('#addItInfo').val()==''){
     //alert("Must to fill the field 'REASON TO PRF REQUEST'");
     //return false;

     var msg ="Oops! This field must to be filled";
     $('#addItInfo').attr('data-original-title',msg);
     $('#addItInfo').tooltip('show');
     setTimeout( function(){ 
           $('#addItInfo').tooltip('hide');
           $('#addItInfo').removeAttr('title');
           $('#addItInfo').removeAttr('data-original-title'); 
       }  , 2500 ); //Wait 2,5 seconds   

       return false;
 }
 
 //CSS
 
 .tooltip {
  position: absolute;
  z-index: 1070;
  display: block;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  line-height: 1.42857143;
  text-align: left;
  text-align: start;
  text-decoration: none;
  text-shadow: none;
  text-transform: none;
  letter-spacing: normal;
  word-break: normal;
  word-spacing: normal;
  word-wrap: normal;
  white-space: normal;
  filter: alpha(opacity=0);
  opacity: 0;

  line-break: auto;
}
.tooltip.in {
  filter: alpha(opacity=90);
  opacity: .9;
}
.tooltip.top {
  padding: 5px 0;
  margin-top: -3px;
}
.tooltip.right {
  padding: 0 5px;
  margin-left: 3px;
}
.tooltip.bottom {
  padding: 5px 0;
  margin-top: 3px;
}
.tooltip.left {
  padding: 0 5px;
  margin-left: -3px;
}
.tooltip-inner {
  max-width: 200px;
  padding: 3px 8px;
  color: #fff;
  text-align: center;
  background-color: #000;
  border-radius: 4px;
}
.tooltip-arrow {
  position: absolute;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
}
.tooltip.top .tooltip-arrow {
  bottom: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.top-left .tooltip-arrow {
  right: 5px;
  bottom: 0;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.top-right .tooltip-arrow {
  bottom: 0;
  left: 5px;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.right .tooltip-arrow {
  top: 50%;
  left: 0;
  margin-top: -5px;
  border-width: 5px 5px 5px 0;
  border-right-color: #000;
}
.tooltip.left .tooltip-arrow {
  top: 50%;
  right: 0;
  margin-top: -5px;
  border-width: 5px 0 5px 5px;
  border-left-color: #000;
}
.tooltip.bottom .tooltip-arrow {
  top: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}
.tooltip.bottom-left .tooltip-arrow {
  top: 0;
  right: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}
.tooltip.bottom-right .tooltip-arrow {
  top: 0;
  left: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}