var ksmsa = {
	xmlHttp : null,
	xmlCallback : null,

	createXmlHttp: function() {
		if (window.ActiveXObject)
			return new ActiveXObject('Microsoft.XMLHTTP');
		else
		if (window.XMLHttpRequest)
			return new XMLHttpRequest();
	},

	asyncRequest: function(url, callback) {
		this.xmlHttp = this.createXmlHttp();
		this.xmlHttp.onreadystatechange = this.callbackInternal;
		this.xmlCallback = callback;
		this.xmlHttp.open('GET', url, true);
		this.xmlHttp.send(null);
	},
	
	callbackInternal: function() {
		if (ksmsa.xmlHttp.readyState == 4)  {
			if (ksmsa.xmlHttp.status == 200) {
				ksmsa.xmlCallback.onSuccess(ksmsa.xmlHttp.responseText);
			}
			else {
				ksmsa.xmlCallback.onError(ksmsa.xmlHttp.responseText);
			}
		}
	},
	
	findPos: function (obj) {
		var curleft = curtop = 0;
		if (obj.offsetParent) {
			do {
				if (obj.style.position == 'relative')
					break;
				curleft += obj.offsetLeft;
				curtop += obj.offsetTop;
			} while (obj = obj.offsetParent);
		}
		return { x: curleft, y: curtop };
	}
	
}

function encode(x) {
	var s = '';
	for (i=0; i<x.length; i++) {
		var c = x.charAt(i);
		if (x.charCodeAt(i) > 128) {
			var code = x.charCodeAt(i);
			s += '%' + hex((0xC0 | ((code >> 6) & 0x1F)));
			s += '%' + hex((0x80 | ((code >> 0) & 0x3F)));
		}
		else
			s += c;
	}
	return s;
}

function getElementOffset(element) {
	var p = {x: element.offsetLeft, y: element.offsetTop };
	var bar = document.getElementById('menuBar');
	if (bar != null && (navigator.appVersion.indexOf('MSIE 6') != -1 || navigator.appVersion.indexOf('MSIE 7') != -1)) {
		p.x += bar.offsetLeft;
		p.y += bar.offsetTop;
	}
	return p;
}

function setClass(element, cls) {
	element.setAttribute('class', cls);
	element.setAttribute('className', cls);
}

function _getClass(element) {
	var c = element.getAttribute('class');
	if (c == null)
		c = element.getAttribute('className');
	return c;
}

function addClass(element, cls) {
	var c = _getClass(element);
	if (c == null || c == '')
		setClass(element, cls);
	else
		setClass(element, c + ' ' + cls);
}

function removeClass(element, cls) {
	var c = _getClass(element);
	if (c == null || c == '')
		return;
	c = c.replace(cls, '');
	setClass(element, c);
}