var authloaded=false;
var archloaded=false;
var kwloaded=false;

ImgPath =  "images/";
KwFile =   "keywords/index.html";
AuthFile = "authors/index.html";
ArchFile = "vol/index.html";

function ShowArchive(){
   archive.style.display='';
   auth.style.display='none';
   search.style.display='none';
   kw.style.display='none';

   document.images["head_tab_search"].src = ImgPath + "head-tab-search.gif"
   document.images["head_tab_archive"].src = ImgPath + "head-tab-archive-over.gif"
   document.images["head_tab_author"].src = ImgPath + "head-tab-author.gif"
   document.images["head_tab_kw"].src = ImgPath + "head-tab-kw.gif"

   if(!archloaded){
      archiveframe.document.location.replace(ArchFile);
      archloaded=true;
   }
}


function ShowSearch(){
   archive.style.display='none';
   auth.style.display='none';
   search.style.display='';
   kw.style.display='none';

   document.images["head_tab_search"].src = ImgPath + "head-tab-search-over.gif"
   document.images["head_tab_archive"].src = ImgPath + "head-tab-archive.gif"
   document.images["head_tab_author"].src = ImgPath + "head-tab-author.gif"
   document.images["head_tab_kw"].src = ImgPath + "head-tab-kw.gif"

}

function ShowAuth(){
   archive.style.display='none';
   auth.style.display='';
   search.style.display='none';
   kw.style.display='none';

   document.images["head_tab_search"].src = ImgPath + "head-tab-search.gif"
   document.images["head_tab_archive"].src = ImgPath + "head-tab-archive.gif"
   document.images["head_tab_author"].src = ImgPath + "head-tab-author-over.gif"
   document.images["head_tab_kw"].src = ImgPath + "head-tab-kw.gif"


   if(!authloaded){
      authframe.document.location.replace(AuthFile);
      authloaded=true;
   }
}

function ShowKW(){
   archive.style.display='none';
   auth.style.display='none';
   search.style.display='none';
   kw.style.display='';


   document.images["head_tab_search"].src = ImgPath + "head-tab-search.gif"
   document.images["head_tab_archive"].src = ImgPath + "head-tab-archive.gif"
   document.images["head_tab_author"].src = ImgPath + "head-tab-author.gif"
   document.images["head_tab_kw"].src = ImgPath + "head-tab-kw-over.gif"


   if(!kwloaded){
     kwframe.document.location.replace(KwFile);
     kwloaded=true;
   }
}


function ShowSearchResults(){
  document.all.Content1.style.display='';
  document.all.Content2.style.display='none';
}


function ShowCont1(){
  if(document.parent.document.all.Content1){
    document.parent.document.all.Content1.style.display='';
    document.parent.document.all.Content2.style.display='none';
  }
}