Retrieving and Resetting textEdit Content Using JavaScript

Question

I need to retrieve the content within a textEdit box using JavaScript, and then append a String to that content, and re-enter that content as the inner content of a textEdit box.  Does anyone know how to do this? 
I tried using jsObjectNeeded for textEdit, but it is an invalid parameter for that object.  I also tried grabbing the ID in a round-about way in JavaScript using _1texteditor or _1htmlbeditor, but I get an "Object Expected" error everytime.
Here is the item I am working with, and within my JS method, I need to grab the text inside, append a string to it, and reset that new content as the text within the edit box.
<hbj:textEdit id="summaryBox"
   text="Add summary here."
   wrapping="SOFT"
   tooltip="Add summary here."
   rows="5"
   cols="70">
This is the content inside the box.
</hbj:textEdit>
Thanks in advance for your help...

Answer 1

Thank you for your help, guys, but neither suggestion solved my problem and I solved it on my own.  You have to find the parameter ID through a line of Java, like Damian had mentioned about an ID, but I was looking for the value within the textEdit, not the ID. 
In the JavaScript method, you set a variable to the Java variable, which found the parameter ID.
Then, using that JS variable, you do:
var blah = <%=javaParameterId%>;
var funcName = htmlb_formid+"_getHtmlbElementId";
func = window[funcName];
var textEditField = eval(htmlb_formid + "." + blah);
var wordsWithTexEdit = textEditField.value;
Thanks anyways...