/**
	responseHTML
	(c) 2007-2008 xul.fr		
	Licence Mozilla 1.1
*/	


/**
	Searches for body, extracts and return the content
	New version contributed by users
*/


function getBody(content) 
{
   test = content.toLowerCase();    // to eliminate case sensitivity
   var x = test.indexOf("<body");
   if(x == -1) return "";

   x = test.indexOf(">", x);
   if(x == -1) return "";

   var y = test.lastIndexOf("</body>");
   if(y == -1) y = test.lastIndexOf("</html>");
   if(y == -1) y = content.length;    // If no HTML then just grab everything till end

   return content.slice(x + 1, y);   
} 

/**
	Loads a HTML page
	Put the content of the body tag into the current page.
	Arguments:
		url of the other HTML page to load
		id of the tag that has to hold the content
*/		

UTF8 = {
	encode: function(s){
		for(var c, i = -1, l = (s = s.split("")).length, o = String.fromCharCode; ++i < l;
			s[i] = (c = s[i].charCodeAt(0)) >= 127 ? o(0xc0 | (c >>> 6)) + o(0x80 | (c & 0x3f)) : s[i]
		);
		return s.join("");
	},
	decode: function(s){
		for(var a, b, i = -1, l = (s = s.split("")).length, o = String.fromCharCode, c = "charCodeAt"; ++i < l;
			((a = s[i][c](0)) & 0x80) &&
			(s[i] = (a & 0xfc) == 0xc0 && ((b = s[i + 1][c](0)) & 0xc0) == 0x80 ?
			o(((a & 0x03) << 6) + (b & 0x3f)) : o(128), s[++i] = "")
		);
		return s.join("");
	}
};



function loadHTML(url, fun, storage, param)
{
	var xhr = createXHR();


	xhr.onreadystatechange=function()
	{
		if(xhr.readyState == 4)
		{
			//if(xhr.status == 200)
			{
				storage.innerHTML = getBody(xhr.responseText);
				fun(storage, param);
			}
		}
	};
    //alert(xhr.responseText);
	xhr.open("GET", url , true);
	xhr.send(null);

} 

	/**
		Callback
		Assign directly a tag
	*/		


	function processHTML(temp, target)
	{
		target.innerHTML = temp.innerHTML;
	}

	function loadWholePage(url)
	{
		var y = document.getElementById("storage");
		var x = document.getElementById("displayed");
		loadHTML(url, processHTML, x, y);
	}	


	/**
		Create responseHTML
		for acces by DOM's methods
	*/	
	
	function processByDOM(responseHTML, target)
	{
		target.innerHTML = "Extracted by id:<br />";

		// does not work with Chrome/Safari
		//var message = responseHTML.getElementsByTagName("div").namedItem("two").innerHTML;
		var message = responseHTML.getElementsByTagName("div").item(1).innerHTML;
		
		target.innerHTML += message;

		target.innerHTML += "<br />Extracted by name:<br />";
		
		message = responseHTML.getElementsByTagName("form").item(0);
		target.innerHTML += message.dyn.value;
	}
	
	function accessByDOM(url)
	{
		//var responseHTML = document.createElement("body");	// Bad for opera
		var responseHTML = document.getElementById("storage");
		var y = document.getElementById("displayed");
		loadHTML(url, processByDOM, responseHTML, y);
	}