function set_lecture()
{
   var i = document.searchform.lecture_menu.selectedIndex;
   var lec = document.searchform.lecture_menu[i].value;
   
   document.searchform.query3.value = lec;
 }

function set_chapter()
{
   var i = document.searchform.chapter_menu.selectedIndex;
   var chap = document.searchform.chapter_menu[i].value;

   if(chap != "All") {
   	document.searchform.query2.value = chap;
	}
   else {
	document.searchform.query2.value = '';
   }
}

/*code by Virage*/
function set_hidden_search_fields()
{
   var which = document.searchform.chooser_menu.selectedIndex;
   var chooser_menu = document.searchform.chooser_menu[which].value;

   if (chooser_menu == "AllFiles")
   {
     document.searchform.search_type.value = 'videos,docs';
     document.searchform.query1.value = '';
   }
   else if (chooser_menu == "AllClips")
   {
     document.searchform.search_type.value = 'clips';
     document.searchform.query1.value = '';
   }
   else if (chooser_menu == "AllFilesClips")
   {
     document.searchform.search_type.value = 'all';
     document.searchform.query1.value = '';
   }
   else if (chooser_menu == "VideoFiles")
   {
     document.searchform.search_type.value = 'videos,docs';
     document.searchform.query1.value = 'VIR_CAT_VIDEO';
   }
   else if (chooser_menu == "VideoClips")
   {
     document.searchform.search_type.value = 'clips';
     document.searchform.query1.value = 'VIR_CAT_VIDEO';
   }
   else if (chooser_menu == "AudioFiles")
   {
     document.searchform.search_type.value = 'videos,docs';
     document.searchform.query1.value = 'VIR_CAT_AUDIO';
   }
   else if (chooser_menu == "AudioClips")
   {
     document.searchform.search_type.value = 'clips';
     document.searchform.query1.value = 'VIR_CAT_AUDIO';
   }
   else if (chooser_menu == "WordProcessorFiles")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_DOC';
   }
   else if (chooser_menu == "Presentations")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_PRESENTATION';
   }
   else if (chooser_menu == "Spreadsheets")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_SPREADSHEET';
   }
   else if (chooser_menu == "PDFs")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_PDF';
   }
   else if (chooser_menu == "HTMLFiles")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_HTML';
   }
   else if (chooser_menu == "TextFiles")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_TEXT';
   }
   else if (chooser_menu == "Images")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_IMAGE';
   }
   else if (chooser_menu == "Other")
   {
     document.searchform.search_type.value = 'docs';
     document.searchform.query1.value = 'VIR_CAT_OTHER';
   }
   else
   {
     document.searchform.search_type.value = 'all';
     document.searchform.query1.value = '';
   }
}

var win=null;
function NewWindow(mypage,myname,w,h,scroll,pos){
if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
win=window.open(mypage,myname,settings);}

function URI_builder()
{
   var processing   = "PATH";
   var result       = "";
   var SCHEME       = "";
   var AUTHORITY    = "";
   var PATH         = "";
   var QUERY        = "";
   var PLAYLIST_QUERY = "";
   var FRAGMENT     = "";
   var PATH_part    = "";
   var i            = 0;
   var j            = 0;
   var _AUTHORITY_i = 0;
   var _PATH_i      = 0;
   var _QUERY_i     = 0;
   var _AUTHORITY   = new Array();
   var _PATH        = new Array();
   var PATH_pieces  = new Array();
   var _QUERY       = new Array();
   var name_value   = new Array();

/*
  * Collect components
  */

   for ( i = 0; i < arguments.length; i++ )
   {
     if ( arguments[i] == "SCHEME")
     {
       processing = "SCHEME";
       continue;
     }
     if ( arguments[i] == "AUTHORITY")
     {
       processing = "AUTHORITY";
       continue;
     }
     if ( arguments[i] == "PATH")
     {
       processing = "PATH";
       continue;
     }
     if ( arguments[i] == "QUERY")
     {
       processing = "QUERY";
       continue;
     }
     if ( arguments[i] == "PLAYLIST_QUERY")
     {
       processing = "PLAYLIST_QUERY";
       continue;
     }
     if ( arguments[i] == "FRAGMENT")
     {
       processing = "FRAGMENT";
       continue;
     }
     if ( processing )
     {
       if ( processing == "SCHEME" ) SCHEME = arguments[i];
       if ( processing == "AUTHORITY" )
       {
         _AUTHORITY[_AUTHORITY_i] = arguments[i];
         _AUTHORITY_i++;
       }
       if ( processing == "PATH" )
       {
         _PATH[_PATH_i] = arguments[i];
         _PATH_i++;
       }
       if ( processing == "QUERY" )
       {
         _QUERY[_QUERY_i] = arguments[i];
         _QUERY_i++;
       }
       if ( processing == "PLAYLIST_QUERY" ) PLAYLIST_QUERY = arguments[i];
       if ( processing == "FRAGMENT" ) FRAGMENT = arguments[i];
     }
   }

/*
  * Process components
  */

   if ( SCHEME.indexOf(":") > -1 )
   {
     SCHEME = SCHEME.substring(0, SCHEME.indexOf(":"));
   }

   for ( i = 0; i < _AUTHORITY.length; i++ )
   {
     AUTHORITY ?
       AUTHORITY = AUTHORITY + "." + _AUTHORITY[i] :
       AUTHORITY = _AUTHORITY[i];
   }
   if ( AUTHORITY.charAt(0) == "/" && AUTHORITY.charAt(1) == "/" )
   {
     AUTHORITY = AUTHORITY.substring(2);
   }

   for ( i = 0; i < _PATH.length; i++ )
   {
     if ( _PATH[i].indexOf("/") > -1 )
     {
       PATH_pieces = _PATH[i].split("/");
       for ( j = 0; j < PATH_pieces.length; j++ )
       {
         if ( PATH_pieces[j].indexOf("%") > -1 )
         {
           PATH_pieces = unescape(PATH_pieces[j]);
         }
         PATH_part ?
           PATH_part = PATH_part + "/" + escape(PATH_pieces[j]) :
           PATH_part = escape(PATH_pieces[j]);
       }
         PATH ?
           PATH = PATH + "/" + PATH_part :
           PATH = PATH_part;
     }
     else
     {
       if ( _PATH[i].indexOf("%") > -1 ) _PATH[i] = unescape(_PATH[i]);
       PATH ?
         PATH = PATH + "/" + escape(_PATH[i]) :
         PATH = escape(_PATH[i]);
     }
   }
   if ( PATH.charAt(0) != "/" ) PATH = "/" + PATH;

   for ( i = 0; i < _QUERY.length; i++ )
   {
     name_value = _QUERY[i].split("=");
     if ( name_value[0].indexOf("%") > -1 )
     {
       name_value[0] = unescape(name_value[0]);
     }
     if ( name_value[1].indexOf("%") > -1 )
     {
       name_value[1] = unescape(name_value[1]);
     }
     QUERY ?
       QUERY = QUERY + ";" +
               escape(name_value[0]) + "=" + escape(name_value[1]) :
       QUERY = escape(name_value[0]) + "=" + escape(name_value[1]);
   }

//  if ( FRAGMENT.indexOf("%") > -1 ) FRAGMENT = unescape(FRAGMENT);
   if ( FRAGMENT.charAt(0) == "#" )
   {
     FRAGMENT = FRAGMENT.substring(1) // escape(FRAGMENT.substring(1));
   }
   else
   {
     FRAGMENT = FRAGMENT // escape(FRAGMENT);
   }

/*
  * Assemble URI
  */

   if ( SCHEME )    result = SCHEME + ":";
   if ( AUTHORITY ) result ?
                      result = result + "//" + AUTHORITY :
                      result = "//" + AUTHORITY
   if ( PATH )      result ?
                      result = result + PATH :
                      result = PATH;
   if ( QUERY )     result ?
                      result = result + "?" + QUERY :
                      result = "?" + QUERY;
   if ( PLAYLIST_QUERY )     QUERY ?
                      result = result + "&" + PLAYLIST_QUERY :
                      result = result + "?" + PLAYLIST_QUERY;
   if ( FRAGMENT )  result ?
                      result = result + "#" + FRAGMENT :
                      result = "#" + FRAGMENT;

/*
  * Return URI
  */

   return result;
}