function changeField(field,val1) {
  eval("document."+field+" = val1");
  return 1;
}
function searchSite(formfield) {
  site = document.seek1.targetsite.value;
//  query = document.seek1.qt.value;

//  changeField("seek1.tx0.value","");

  switch(site)
  {
  case '1':
//    changeField("seek1.qt[1].value","+site:dubois.fas.harvard.edu OR +site:aaas.fas.harvard.edu");
  changeField("seek1.op2.value","-");
  changeField("seek1.tx2.value","aaas.fas.harvard.edu/reading_room");

    changeField("seek1.fl0.value","site:");
    changeField("seek1.tx0.value","aaas.fas.harvard.edu");
    break;
  case '2':
//    changeField("seek1.qt[1].value","");
  changeField("seek1.op2.value","");
  changeField("seek1.tx2.value","");

    changeField("seek1.fl0.value","site:");
    changeField("seek1.tx0.value","dubois.fas.harvard.edu");
    break;
  case '3':
//    changeField("seek1.qt[1].value","");
  changeField("seek1.op2.value","");
  changeField("seek1.tx2.value","");
    changeField("seek1.fl0.value","url:");
    changeField("seek1.tx0.value","aaas.fas.harvard.edu/reading_room/aaas");
    break;
  case '4':
//    changeField("seek1.qt[1].value","+url:/reading_room, +site:aaas.fas.harvard.edu");
  changeField("seek1.op2.value","");
  changeField("seek1.tx2.value","");
    changeField("seek1.fl0.value","url:");
    changeField("seek1.tx0.value","aaas.fas.harvard.edu/reading_room/dubois");
    break;
  case '5':
//    changeField("seek1.qt[1].value","+url:/reading_room, +site:dubois.fas.harvard.edu");
    changeField("seek1.tx0.value","");
    break;
//  case '4':
//    changeField("seek1.qt[1].value","+url:/reading_room, +site:dubois.fas.harvard.edu OR +site:aaas.fas.harvard.edu");
//    changeField("seek1.tx0.value","");
//    break;
  default:
    break;
  }
}

function showTip() {
var Tips = new Array();

Tips[0] = 'Tip: You can restrict your search to the title of a document.<br /><br />Example: title:"New Year'+"'"+'s Resolutions"';
Tips[1] = 'Tip: You can use + in front of a term to require it.<br /><br />Example: +"scuba diving", Hawaii, Maui';
Tips[2] = 'Tip: To search for a phrase, surround the words with double quote marks.<br /><br />Example: baseball "Hall of Fame"';
Tips[3] = 'Tip: Putting a - immediately in front of a term excludes any results with that term.<br /><br />Example: printers, -"dot matrix"';
Tips[4] = 'Tip: You may use accented European characters for a more exact match.<br /><br />Examples: caf&eacute;, pi&ntilde;ata';
Tips[5] = 'Tip: Separate unrelated proper names with a comma.<br /><br />Example: Bill Gates, Steve Jobs';
Tips[6] = 'Tip: Search terms are stemmed.<br /><br />Example: network matches networks and networked.';
Tips[7] = 'Tip: You can get a list of all URLs that point to any page.<br /><br />Example: link:http://site/page.html';
Tips[8] = 'Tip: Use lowercase for case-insensitive match. Otherwise, an exact match is used.<br /><br />Example: SPARCstation';
Tips[9] = 'Did you know... You can search for mixed alphanumeric terms.<br /><br />Example: 100base-T Ethernet';
Tips[10] = 'Tip: To search just one web site, use +site: in your query and include the entire site name.<br /><br />Example: pitchers +site:www.knuckleball.com';

var ran_unrounded=Math.random() * (Tips.length + 1);
var ran_number=Math.floor(ran_unrounded);

if (Tips[ran_number]) {
   return Tips[ran_number];
}
return Tips[1];
}