// Cookie²Ù×÷   -- start  --

function getCookieVal (offset){
   var endstr = document.cookie.indexOf (";", offset);
   if (endstr == -1)
      endstr = document.cookie.length;
   return unescape(document.cookie.substring(offset, endstr));
}

function getCookie (name)	{
	 
   var arg = name + "=";
   var alen = arg.length;
   var clen = document.cookie.length;
   var i = 0;
   while (i < clen)	{
      var j = i + alen;
      if (document.cookie.substring(i, j) == arg)
         return getCookieVal (j);
      i = document.cookie.indexOf(" ", i) + 1;
      if (i == 0) 
         break; 
   }
   return null;
}

function setCookie (name,value) {		 
	expdate = new Date();
	expdate.setTime(expdate.getTime() +  (24 * 60 * 60 * 1000 * 365) );
	SetCookieTest( name, value , expdate );
}

function SetCookieTest (name, value, t2 ) {  
	var argv = SetCookieTest.arguments;
   var argc = SetCookieTest.arguments.length;
   var expires = (2 < argc) ? argv[2] : null;
	expires  = t2
   var path = (3 < argc) ? argv[3] : null;
   var domain = (4 < argc) ? argv[4] : null;
   var secure = (5 < argc) ? argv[5] : false;
   document.cookie = name + "=" + escape (value)+ ((expires == null) ? "" : ("; path=/; expires=" + expires.toGMTString())) +((domain == null) ? "" : ("; domain=" + domain)) +    ((secure == true) ? "; secure" : "");
   
}

// Cookie²Ù×÷   -- end --
var menu="";
function showmenu(menu){
	this.menu=menu; 
	this.menu.style.visibility = "visible";
}
function hiddenmenu(menu){
	menu.style.visibility='hidden';
}
 
function tile(){
 
if (!document.all)
return
var source=event.srcElement
if (source.tagName=="IMG"){
document.body.style.backgroundImage="url("+source.src+")"; 
 setCookie("background",source.src); 
  hiddenmenu(menu);
}
}

function restore(){
document.body.style.backgroundImage="url("+getCookie('background')+")";
}
 
//document.body.ondblclick=restore