[转]JS页面内查找

    <script language="JavaScript">
        var NS4 = (document.layers);    // Which browser?
        var IE4 = (document.all);
        var win = window;    // window to search.
        var n   = 0;

        function findInPage(str) {
          var txt, i, found;
          if (str == "")
            return false;
          if (NS4) {
            if (!win.find(str))
              while(win.find(str, false, true))
                n++;
            else
              n++;
            if (n == 0)
              alert("Not found.");
          }
          if (IE4) {
            txt = win.document.body.createTextRange();
            for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) {
              txt.moveStart("character", 1);
              txt.moveEnd("textedit");
            }
            if (found) {
              txt.moveStart("character", -1);
              txt.findText(str);
              txt.select();
              txt.scrollIntoView();
              n++;
            }
            else {
              if (n > 0) {
                n = 0;
                findInPage(str);
              }
            }
          }
          return false;
        }
    </script>