pass value from javascript into cfc

Well, you could always use AJaX to pass it to the CFC.  But what will trigger it?  onBlur()?

onBlur="pass2cfc(this.value);"

function pass2cfc(vlu){

  var xhr = new XMLHttpRequest();

  xhr.open('POST','/path/to/cfc/filename.cfc',true);

  xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');

  xhr.send('cfcArg=' + vlu);

  xhr.onreadystatechange = function(){

    if(xhr.readyState == 4 && xhr.status == 200){

      //success code

      }

  }

}

HTH,

^_^