[Javascript] regexp - how to exclude a substring?

Mon May 23 11:18:11 CDT 2005

Paul,

I believe I have something that fulfills the requirements, although it
seems to freeze
my browser when I let it go through too many iterations.

Take a look, and let me know what you think. I think there's a
fundemental flaw somewhere, but I think we can find it as a group.

Everyone who takes the time to look at it: Feedback please! I know
there's some good stuff and some boo-boos in there, but I need help in
telling the one from the other.  ;o)

Shawn

<html>
   <head>
      <title>Paul's DIV Dilemma</title>

      <script type="text/javascript">

         function parseDivs(sourceTA, destTA){

            var startPos = 0;
            var endPos = 0;
            var longString = '';
            var tempString = '';
            var loopBreak = 0;

            destTA.value = '';
            longString = sourceTA.value.replace(/\n/gim, '');

            destTA.value =  destTA.value + longString.length;
            destTA.value = destTA.value + '\n-----------------------------\n';

            while (longString.indexOf('<div') && loopBreak < 10){

               loopBreak += 1;

               startPos = longString.indexOf('<div');
               endPos = longString.indexOf('</div');

               tempString = longString.substr(startPos, endPos - startPos + 5);

               //If there is an opening div in here,
               //then we haven't found the non-nested
               //div. Otherwise, then we have.   '
               if (tempString.indexOf('<div')){
                  destTA.value = destTA.value + 'non match\n' + tempString;
                  destTA.value = destTA.value +
'\n-----------------------------\n';
               }else{
                  destTA.value = destTA.value + 'match \n' + tempString;
                  destTA.value = destTA.value +
'\n-----------------------------\n';

               }

               longString = longString.substr(endPos + 5);

            }

            destTA.value = destTA.value + '\n' + loopBreak + ' iterations.\n';

         }
      </script>
   </head>
   <body>
      <form id="frmTest" method="post" action="pdd.html">
         <textarea cols="50" rows="20" id="bigText"></textarea>

         <input type="button" id="btnParse" value="Parse DIVs"
onclick="parseDivs(document.forms['frmTest'].bigText,
document.forms['frmTest'].txtOut);" />

         <textarea cols="50" rows="20" id="txtOut"></textarea>
      </form>
   </body>
</html>