title: can someone help me to add astrict to javascript regex
body: <p>can someone help me to add *, &amp;, (, ), to the following regex?</p>
  
  <pre><code>var r=/^[\sa-zA-Z0-9'\.,-]+$/;
  
  if(!(r.test(search_key))){
      alert("Sorry, you have entered invalid characters, please try again.");     
      return false;
  }
  if(search_key =="Keyword(s)"){
      document.getElementById("field1").value = "";
  }
  if(search_city =="City, State or Zip"){                     
      document.getElementById("GH_search_field2").value = "";
  }
  </code></pre>