add: return false; 
context:   function highlightWord(node, word, searchwordindex) {    // If this node is a text node and contains the search word, highlight it by    // surrounding it with a span element    if (node.nodeType == 3) { // Node.TEXT_NODE      var pos = node.nodeValue.toLowerCase().indexOf(word.toLowerCase());      if (pos >= 0 && !node.parentNode.className.match(/^searchword\d/)) {        var span = document.createElement("span");        span.className = "searchword" + (searchwordindex % 5);        span.appendChild(document.createTextNode(            node.nodeValue.substr(pos, word.length)));        var newNode = node.splitText(pos);        newNode.nodeValue = newNode.nodeValue.substr(word.length);        node.parentNode.insertBefore(span, newNode);      }    } else if (!node.nodeName.match(/button|select|textarea/i)) {      // Recurse into child nodes      for (var i = 0; i < node.childNodes.length; i++) {        highlightWord(node.childNodes[i], word, searchwordindex);      }    }  }
meta: 1802	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1802/13bd5a3a3b2e2577101f9d1bfac7bef83549759c/trac.js/buggy/htdocs/trac.js