Thread: Scanning a document for tags

i'm using this code to scan a document for the <script and </script> tags, I'm trying to copy each occurance of javascript from a html file and past is into a seperate edit.

Code:

          szJava = NULL;
          szBuffer[len] = '\0';
          if(szJava = strstr(szBuffer,"<script"))
          {
            szRemain = strstr(szBuffer,"</script>");
            strcpy(szRemain, szBuffer);
            *szRemain = '\0';
            SetWindowText(hJavaSource,szJava);
          }
          while(szJava != NULL)
          {
            szJava = NULL;
            if(szJava = strstr(szBuffer,"<script"))
            {
              szBuffer[strlen(szBuffer)] = '\0';
              szRemain = strstr(szBuffer,"</script>");
              strcpy(szRemain, szBuffer);
              *szRemain = '\0';
              AddWindowText(hJavaSource,szJava);
            }
          }

if i only use the first part of this, the section not in the while loop it works fine but only finds the first occurance of the script tag. but once i added the while loop in it, it crashes with an Access violation message. is there anything wrong with the code or a better way to do this?