[RESOLVED] Counting the occurences of a string within a string

[BIOSTALL]

Hey, i need to count the occurences of a string within a string. I am currently using this:

var bcount=0;
var bccount=0;

pos = str.indexOf("[bold]");
  while ( pos != -1 ) {
     bcount++;
     pos = str.indexOf("[bold]",pos+1);
  }
 pos = str.indexOf("[/bold]");
  while ( pos != -1 ) {
     bccount++;
     pos = str.indexOf("[/bold]",pos+1);
  }
 if (bcount>bccount) {
  alert("You have more opening 'Bold' tags than closing 'Bold' tags");
  return false;
 }
 if (bcount<bccount) {
  alert("You have more closing 'Bold' tags than opening 'Bold' tags");
  return false;
 }

But it's not working. Could someone please suggest any ideas??

Thanks, much appreciated, BIOSTALL