"Node was not found" - NS_ERROR_DOM_NOT_FOUND_ERR

Hello to all!

I need help regarding this script:

<script type="text/javascript">
<!--
var ta=new Array();
function addTextArea(n, lang, value){
var remove = document.getElementById('txtara'+n);
if (remove.hasChildNodes()){
remove.removeChild(remove.removeChild(ta[n]));
}
ta[n]=document.createElement('textarea');
ta[n].name='straInsert[description_'+lang+']';
ta[n].setAttribute('rows',7);
ta[n].setAttribute('cols',70);
ta[n].setAttribute('wrap','virtual');
ta[n].value=value;
document.getElementById('txtara'+n).appendChild(ta[n]);
}
//-->
</script>


but unfortunately, i become this error:

Error: uncaught exception: [Exception... "Node was not found" code: "8" nsresult: "0x80530008 (NS_ERROR_DOM_NOT_FOUND_ERR)"

The Problem as i understand it, is at line " remove.removeChild(remove.removeChild(ta[n])); "
Although this error in error console, the script is working smoothly & perfect, but this error is annoying!
What am i doing wrong? Can you please help me? Any help wil be appreciated!
Thank you in advance!

 

check availability of the each element on that line

 

Thank you for your answer, but this still not help me!
Each element is available and functional, but i still become this error! The idea is when a person need one more textarea, the script build it, and when not, the script hide it (every time by clicking of the same link). All this is functioning, but the error is still there