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Javascript Resizing Textarea

purdyra1 asked
Last Modified: 2012-05-12
I used this code and overall it worked great BUT for some reason if I type in 18 characters it works fine, but if I type in 19 characters it grows by 2 lines instead of one, so by the time I enter 30 different lines, I have 30 extra lines at the bottom instead of just 1 or 2 extra lines at the bottom. I tried expanding the textbox width but that didn’t seem to help at all. Any small change I can make to the code or any idea of anything I can do, I really need this functionality and it’s great, thank you!

  <script type="text/javascript">
    function sz(t) {
                    a = t.value.split('\n');
                    for (x=0;x < a.length; x++) {
                     if (a[x].length >= t.cols) b+= Math.floor(a[x].length/t.cols);
                    b+= a.length;
                     if (b > t.rows) t.rows = b;

I got the code from here.  
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