var Base64 = {
 
	// private property
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~-_",
 
	// public method for encoding
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = Base64._utf8_encode(input);
 
		while (i < input.length) {
 
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);
 
			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;
 
			if (isNaN(chr2)) {
				enc3 = enc4 = 64;
			} else if (isNaN(chr3)) {
				enc4 = 64;
			}
 
			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
 
		}
		 
		return output;
	},
 
	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	}
 }
	
function loadShoutBox()	{
	if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp=new XMLHttpRequest();
	} else {// code for IE6, IE5
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	var d = new Date();
	
	xmlhttp.onreadystatechange=function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			document.getElementById('scrollbar_content').innerHTML=xmlhttp.responseText + '<p style="margin:0"></p>';
			
			scrollbar.recalculateLayout();
			scrollbar.scrollTo('bottom',false);
			
			window.setTimeout(loadShoutBox, 60000);
		}
	}
	
	xmlhttp.open("GET",'/latestshouts.php?bypassCache=' + Base64.encode(d.getTime().toString()) ,true);
	xmlhttp.send();
	
}

function submitShouts()	{
	if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp=new XMLHttpRequest();
	} else {// code for IE6, IE5
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	var d = new Date();

	xmlhttp.onreadystatechange=function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			document.getElementById('scrollbar_content').innerHTML=xmlhttp.responseText + '<p style="margin:0"></p>';
			
			scrollbar.recalculateLayout();
			scrollbar.scrollTo('bottom',false);
		}
	}
	
	shout	= document.getElementById('shout').value;
	
	xmlhttp.open("GET",'/submitshout.php?encoding=base64&shout=' + Base64.encode(shout) + '&bypassCache=' + Base64.encode(d.getTime().toString()) ,true);

	document.getElementById('shout').value = '';

	xmlhttp.send();
	
	return false;
}