function toggleDesc(id) {

    if (document.getElementById(id).style.display != 'inline') {
        http[id] = createRequestObject();
        content = 'id=' + id;

        http[id].open('post', 'desc.php');
        try {
            http[id].setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
        } catch (e) { ; }

        http[id].onreadystatechange = function() { // begin anon function

               if(http[id].readyState == 4) {
                   try {
                          if (http[id].status == 200) {

                              node = document.getElementById(id + 'short');
                              node.style.display = 'none';

                              node = document.getElementById(id);
                              node.innerHTML = http[id].responseText;
                              node.style.display = 'inline';

                          } else {
                              alert("There was an error when the AJAX call happened.  Error was: \n " + http[id].statusText);
                          }
                   } catch (e) { ; }
               }
        } // end anon function

        http[id].send(content);
    } else {
        document.getElementById(id).style.display = 'none';
        node = document.getElementById(id + 'short');
        node.style.display = 'inline';
    }
}

function doBrowse(l, tab) {

    node = document.getElementById('searchInProgress');
    node.style.display = 'inline';
    letter = l;
    sndReq(tab, 'doBrowse', tab);
}

function doID(i, tab) {

    node = document.getElementById('searchInProgress');
    node.style.display = 'inline';
    recID = i;
    sndReq(tab, 'doSearch', tab);
}

function doSearch(tab) {

    node = document.getElementById('searchInProgress');
    node.style.display = 'inline';
    sndReq(tab, 'doSearch', tab);
}



function page(o, div) {

    if (div == '')
        div = 'allDiv';

    offset = o;

    sndReq(div, 'offset', div);

}

/*  this creates our request object. */ 

function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http    = new Array();
var updated = new Array();
var offset = 0;
var letter = "";
var recID  = "";

/*  the workhorse function, which does the AJAX request. */

function sndReq(id, action, type) {

    http[type] = createRequestObject();
    request = buildContent(id, action, type);

    if (request == '' || request == null)
        return false;

    http[type].open('post', 'fedSearch.php');
    try {
        http[type].setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
    } catch (e) { ; }

    http[type].onreadystatechange = function() { // begin anon function

           if(http[type].readyState == 4) {
               try {
                      if (http[type].status == 200) {
                          updateResult(http[type].responseText, type, action);
                      } else {
 
                          alert("There was an error when the AJAX call happened.  Error was: \n " + http[type].statusText); 
                      }
               } catch (e) { ; }
           }
    } // end anon function

    http[type].send(request);
    doCallback(action, type);
}

function updateResult(content, type, action) {

    if (action == 'doSearch' || action == 'doBrowse') { 
        node = document.getElementById('searchInProgress');
        node.style.display = 'none';
    }

    node = document.getElementById(type);
    if (content != '')
        node.innerHTML = content;
    else if (action == 'doSearch') 
        doSearch(type);
}

function buildContent(id, action, type) {

    var content = '';
    if (type == 'journalsDiv')
        content += 'limitResourceType=jour&';

    if (type == 'enewsDiv')
        content += 'limitResourceType=enews&';

    if (type == 'indexesDiv')
        content += 'limitResourceType=indexes&';

    if (type == 'refmatDiv')
        content += 'limitResourceType=refmat&';

    if (action == 'doSearch') {

        content += 'doSearch=1&';
        // check for an optional ID
        content += "id=" + encodeURIComponent(recID) + "&";

        // grab the keywords to search title
        node = document.getElementById('title');
         // var title = encodeURIComponent(node.value.replace(' & ', ' and '));
         var title = encodeURIComponent(node.value);
        content += "title=" + title + "&";

        // now do the radio buttons for title searching
        var radiobuttons = new Array('searchtype_exact', 'searchtype_browse', 'searchtype_every');

        for (i = 0 ; i < radiobuttons.length ; i ++) {

            node = document.getElementById(radiobuttons[i]);
            if (node.checked)
                content += 'searchtype=' + node.value + '&';
        }	
    } else if (action == 'offset') {
        content += 'offset=' + offset + '&';
    } else if (action == 'doBrowse') {
        content += 'doSearch=1&browse=' + letter + '&searchtype=browse&';
    }

    var node = document.getElementById('sub');
    var sub = encodeURIComponent(node.value);
    content += "sub=" + sub + "&";
    // alert(content); 
    return content;

}

function doCallback(action, type) {

}