//   &nbsp;<a href="#" name="headRegion" onclick="expand('headRegion');savePreferences();return false">-&lt;head&gt;</a><br/>
//    <div name="headRegion">

function expand(theName){
  var theLink = document.getElementsByName(theName)[0];
  var theDiv = document.getElementsByName(theName)[1];
  var theText = theLink.firstChild.data.substring(1);
  if(theDiv.style.display == "none"){
    theDiv.style.display ="block";
    theLink.firstChild.data = "-"+theText;
  }else{
    theDiv.style.display = "none";
    theLink.firstChild.data = "+"+theText;
  }
}

function getCookie(key){
  var theCookie= "";
  var cookies=document.cookie.split("; ");
  for(i=0;i<cookies.length;i++){
    var aCookie = cookies[i].split("=");
    if(aCookie[0] == key){
      theCookie = unescape(aCookie[1]);
    }
  }
  return theCookie;
}
function setCookie(key,val) {
  tmp=key+"="+escape(trim4kb(val))+"; ";
  tmp+="expires=Fri, 31-Dec-2010 23:59:59; ";
  document.cookie=tmp;
}
function setCookieQuickly(key,val) {
  tmp=key+"="+escape(val.substring(0,3500))+"; ";
  tmp+="expires=Fri, 31-Dec-2010 23:59:59; ";
  document.cookie=tmp;
}

function trim4kb(str){
  if(moreThan4kb(str)){
    str = str.substring(0,4000);
    while(moreThan4kb(str)){
     str = str.substring(0,str.length-10);
    }
    return str;
  }else{
    return str;
  }
}
function moreThan4kb(str){
  return escape(str).length > 4000;
}


function savePreferences(){
  var tags = document.getElementsByTagName("input");
   var i=0;
  for(i=0;i<tags.length;i++){
    if(tags[i].type == "checkbox"){
      savePref(tags[i].name,tags[i].checked);
     }else if(tags[i].type == "radio"){
      if(tags[i].checked){
        savePref(tags[i].name,tags[i].value);
      }else{
        removePref(tags[i].name);
      }
    }
  }
} 

function loadPreferences(){
    var tags = document.getElementsByTagName("input");
   var i=0;
    for(i=0;i<tags.length;i++){
      if(tags[i].type == "checkbox"){
        tags[i].checked = "true" == loadPref(tags[i].name);
      }else if(tags[i].type == "radio"){
        tags[i].checked = tags[i].value== loadPref(tags[i].name);
      }
    }
}
   function removePref(key){
   var prefs = getCookie("preferences");
     var equal = 0;
     if(-1 != (equal = prefs.indexOf(key+"="))){
       var tempPrefs = "";
        tempPrefs = prefs.substring(0,equal);
        tempPrefs+= prefs.substring(prefs.indexOf(";",equal)+1);
        prefs = tempPrefs;
     setCookie("preferences",prefs);
     }
   }
   function savePref(key,value){
   var prefs = getCookie("preferences");
     var equal = 0;
     if(-1 != (equal = prefs.indexOf(key+"="))){
       var tempPrefs = "";
        tempPrefs = prefs.substring(0,equal);
        tempPrefs+= key+"="+value;
        tempPrefs+= prefs.substring(prefs.indexOf(";",equal));
        prefs = tempPrefs;
     }else{
        prefs+= key+"="+value+";";
     }
     setCookie("preferences",prefs);
   }
   function loadPref(key){
     var prefs = getCookie("preferences");
     var equal = 0;
     if(-1 != (equal = prefs.indexOf(key+"="))){
        return prefs.substring(equal+key.length+1,prefs.indexOf(";",equal));
     }else{
        return "";
     }
   }

   function test(){
     initTest();
     setCookie("preferences","");
     savePref("hoge","foo");
     assertEquals("foo",loadPref("hoge"));
     assertEquals("hoge=foo;",getCookie("preferences"));
     savePref("hoge","foo1");
     assertEquals("foo1",loadPref("hoge"));
     assertEquals("hoge=foo1;",getCookie("preferences"));
     savePref("foo","bar");
     assertEquals("bar",loadPref("foo"));
     savePref("foo","bar2");
     assertEquals("hoge=foo1;foo=bar2;",getCookie("preferences"));
     savePref("hoge","foo2");
     assertEquals("foo2",loadPref("hoge"));
     assertEquals("hoge=foo2;foo=bar2;",getCookie("preferences"));
     removePref("hoge");
     assertEquals("",loadPref("hoge"));
assertEquals("foo=bar2;",getCookie("preferences"));
     showResult();
   }

   var testResult = "";
   var successCount = 0;
   var errorCount = 0;
   var errorMessage = "";
   function initTest(){
     testResult = "";
     successCount = 0;
     errorCount = 0;
     errorMessage = "";
   }
   function assertEquals(var1,var2){
     if(var1 == var2){
         successCount++;
         testResult+=".";
     }else{
         errorCount++;
         testResult+="e";
         errorMessage += "test["+(successCount+errorCount)+"] expected:["+var1+"],actual:["+var2+"]<br>";
     }
   }   
   function showResult(){
     document.getElementById("resultArea").innerHTML = testResult+"<br>success:"+successCount+"<br>error:"+errorCount+"<br>"+errorMessage;
   }