use this code in HTML:
----------------------------------------
<script type="text/javascript">
      function myf() {alert("Hello World"); }
</script>

<textarea onmouseup="|"></textarea>
-------------------------------------
invode cc at possition of "|" -> No suggestions
press Space to add one more space before cursor:
-------------------------------------
<textarea onmouseup=" |"></textarea>
-------------------------------------
invoke cc -> myf() in already offered