function highlight(value, term) {
    var pattern='\\b(?=\\w)' + term;
    var regex = new RegExp(pattern, 'gi');
    return value.replace(regex, '<strong>' + term + '</strong>');
}
function matchSubset4(s, sub) {
    s = s.toLowerCase();
    var pattern='\\b(?=\\w)' + sub;
    var regex = new RegExp(pattern, 'gi');
    return regex.test(s);
}
function doMatch(s, sub){
      if(matchSubset4(s,sub)){
         document.writeln(highlight(s,sub)+"<br/>");
      }
}

var predictive_search = new Array('sdaf taf' ,'testing report\'s to moderator' ,'zzzzzzzzzz');

doMatch(predictive_search[0],'t');
doMatch(predictive_search[1],'testing report');
doMatch(predictive_search[1],'s to');