When you type something like "red:Hi:" it will type "Hi" in red. The following script does not work and I do not know why, (The one who made the sorting PHP function is Graphain, thanks again!)

<?php 
  function getit($raw)
  {
  # If the value was posted
  $raw = isset($raw) ? $raw : "";
  # Split it based on ':'
  $parsed = explode(':', $raw);

  $colorClass = "";
  $text = "";

  if (count($parsed) >= 2)
  {
    $colorClass = $parsed[0];
    $text = $parsed[1];
    $text = "~~~" . $text . "~~~" . $colorClass;
    return $text;
  }
  }
?>

<script type="text/javascript">
function postit()
{
    var preview = document.getElementById("preview").value;
    var submit = document.getElementById("post").value;
    var text = <?php getit(submit); ?>
    var t = text[0];
    preview = t;
}
</script>

<textarea id="preview" cols=70 rows=5 readonly>Preview box</textarea>
<p>
<textarea id="post" cols=70 rows=5/>Submit box</textarea>
<p>
<input type="button" onclick="postit();" value="Submit"/>