Maximum Length of Content for the RTE

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   I have used the RTE to upgrade my standard Text Areas. My old Text Areas had an OnKeyUp Event which called a Javascript function called CheckMax:

onKeyUp="checkMax(this.form)"

This Javascript function basically checked that the input was no longer that 8000 characters. It would update a textBox on the Form to indicate how many characters are left.

Here is the Javascript Function:
function checkMax(j){ 
    intMaxLen = 8000 
    if (j.txtIssueNotes.value.length <= intMaxLen) { 
         intCharsLeft = intMaxLen - j.txtIssueNotes.value.length 
    } 
    else { 
          j.txtIssueNotes.value = j.txtIssueNotes.value.substring(0,intMaxLen) intCharsLeft = 0 
     } 
     j.txtCharsLeft.value = intCharsLeft 
}

The problem is now that with the RTE controlling the TextArea, this no longer works.
Any ideas on how I could get it to work again?

Thanks