function hasSupport() {

	if (typeof hasSupport.support != 'undefined')
		return hasSupport.support;
	
	var ie55 = /msie 5\.[56789]/i.test(navigator.userAgent);
	
	hasSupport.support = (typeof document.implementation != 'undefined' &&
			document.implementation.hasFeature('html','1.0') || ie55)
			
	if (ie55) {
		document._getElementsByTagName = document.getElementsByTagName;
		document.getElementsByTagName = function (sTagName) {
			if (sTagName == '*')
				return document.all;
			else
				return document._getElementsByTagName(sTagName);
		};
	}

	return hasSupport.support;
}


function DHTMLTabPane(el,bUseCookie) {
	if (!hasSupport() || el == null) return;
	
	this.element = el;
	this.element.tabPane = this;
	this.pages = [];
	this.selectedIndex = null;
	//this.useCookie = bUseCookie != null ? bUseCookie : true;
	this.element.className = this.classNameTag + ' ' + this.element.className;
	this.tabRow = document.createElement('div');
	this.tabRow.className = 'row';
	el.insertBefore(this.tabRow,el.firstChild);
	var tabIndex = 0;
	if (this.useCookie) {
		tabIndex = Number(DHTMLTabPane.getCookie('DHTMLtab_' + this.element.id));
		if (isNaN(tabIndex))
			tabIndex = 0;
	}
	this.selectedIndex = tabIndex;
	var cs = el.childNodes;
	var n;
	for (var i = 0; i < cs.length; i++) {
		if (cs[i].nodeType == 1 && cs[i].className == 'tab_page') {
			this.addTabPage(cs[i]);
		}
	}
}

DHTMLTabPane.prototype.classNameTag = 'tab_pane';

DHTMLTabPane.prototype.setSelectedIndex = function (n) {
	if (this.selectedIndex != n) {
		if (this.selectedIndex != null && this.pages[ this.selectedIndex ] != null)
			this.pages[ this.selectedIndex ].hide();
		this.selectedIndex = n;
		this.pages[ this.selectedIndex ].show();
		
		//if (this.useCookie)
			//DHTMLTabPane.setCookie('DHTMLtab_' + this.element.id,n);
	}
};
	
DHTMLTabPane.prototype.getSelectedIndex = function () {
	return this.selectedIndex;
};
	
DHTMLTabPane.prototype.addTabPage = function (oElement) {
	if (!hasSupport()) return;
	
	if (oElement.tabPage == this)
		return oElement.tabPage;
	var n = this.pages.length;
	var tp = this.pages[n] = new DHTMLTabPage(oElement,this,n);
	tp.tabPane = this;
	this.tabRow.appendChild(tp.tab);
			
	if (n == this.selectedIndex)
		tp.show();
	else
		tp.hide();
		
	return tp;
};
	
DHTMLTabPane.prototype.dispose = function () {
	this.element.tabPane = null;
	this.element = null;		
	this.tabRow = null;
	
	for (var i = 0; i < this.pages.length; i++) {
		this.pages[i].dispose();
		this.pages[i] = null;
	}
	this.pages = null;
};

DHTMLTabPane.setCookie = function (sName,sValue,nDays) {
	var expires = '';
	if (nDays) {
		var d = new Date();
		d.setTime(d.getTime() + nDays * 24 * 60 * 60 * 1000);
		expires = '; expires=' + d.toGMTString();
	}

	document.cookie = sName + '=' + sValue + expires + '; path=/';
};

DHTMLTabPane.getCookie = function (sName) {
	var re = new RegExp('(\;|^)[^;]*(' + sName + ')\=([^;]*)(;|$)');
	var res = re.exec(document.cookie);
	return res != null ? res[3] : null;
};

DHTMLTabPane.removeCookie = function (name) {
	setCookie(name,'',-1);
};

function DHTMLTabPage(el,tabPane,nIndex) {
	if (!hasSupport() || el == null) return;
	
	this.element = el;
	this.element.tabPage = this;
	this.index = nIndex;
	
	var cs = el.childNodes;
	for (var i = 0; i < cs.length; i++) {
		if (cs[i].nodeType == 1 && cs[i].className == 'tab') {
			this.tab = cs[i];
			break;
		}
	}
	var a = document.createElement('A');
	this.aElement = a;
	a.href = '#';
	a.onclick = function () { return false; };
	while (this.tab.hasChildNodes())
		a.appendChild(this.tab.firstChild);
	this.tab.appendChild(a);
	var oThis = this;
	this.tab.onclick = function () { oThis.select(); };
	this.tab.onmouseover = function () { DHTMLTabPage.tabOver(oThis); };
	this.tab.onmouseout = function () { DHTMLTabPage.tabOut(oThis); };
}

DHTMLTabPage.prototype.show = function () {
	var el = this.tab;
	var s = el.className + ' selected';
	s = s.replace(/ +/g,' ');
	el.className = s;
	
	this.element.style.display = 'block';
};

DHTMLTabPage.prototype.hide = function () {
	var el = this.tab;
	var s = el.className;
	s = s.replace(/ selected/g,'');
	el.className = s;

	this.element.style.display = 'none';
};
	
DHTMLTabPage.prototype.select = function () {
	this.tabPane.setSelectedIndex(this.index);
};
	
DHTMLTabPage.prototype.dispose = function () {
	this.aElement.onclick = null;
	this.aElement = null;
	this.element.tabPage = null;
	this.tab.onclick = null;
	this.tab.onmouseover = null;
	this.tab.onmouseout = null;
	this.tab = null;
	this.tabPane = null;
	this.element = null;
};

DHTMLTabPage.tabOver = function (tabpage) {
	var el = tabpage.tab;
	var s = el.className + ' hover';
	s = s.replace(/ +/g,' ');
	el.className = s;
};

DHTMLTabPage.tabOut = function (tabpage) {
	var el = tabpage.tab;
	var s = el.className;
	s = s.replace(/ hover/g,'');
	el.className = s;
};

function setupAllTabs() {
	if (!hasSupport()) return;

	var all = document.getElementsByTagName('*');
	var l = all.length;
	var tabPaneRe = /tab\-pane/;
	var tabPageRe = /tab\-page/;
	var cn,el;
	var parentTabPane;
	
	for (var i = 0; i < l; i++) {
		el = all[i]
		cn = el.className;
		if (cn == '') continue;
		if (tabPaneRe.test(cn) && !el.tabPane)
			new DHTMLTabPane(el);
		else if (tabPageRe.test(cn) && !el.tabPage &&
					tabPaneRe.test(el.parentNode.className)) {
			el.parentNode.tabPane.addTabPage(el);			
		}
	}
}

function disposeAllTabs() {
	if (!hasSupport()) return;
	
	var all = document.getElementsByTagName('*');
	var l = all.length;
	var tabPaneRe = /tab\-pane/;
	var cn,el;
	var tabPanes = [];
	
	for (var i = 0; i < l; i++) {
		el = all[i]
		cn = el.className;
		if (cn == '') continue;
		if (tabPaneRe.test(cn) && el.tabPane)
			tabPanes[tabPanes.length] = el.tabPane;
	}
	
	for (var i = tabPanes.length - 1; i >= 0; i--) {
		tabPanes[i].dispose();
		tabPanes[i] = null;
	}
}


if (typeof window.addEventListener != 'undefined')
	window.addEventListener('load',setupAllTabs,false);
else if (typeof window.attachEvent != 'undefined') {
	window.attachEvent('onload',setupAllTabs);
	window.attachEvent('onunload',disposeAllTabs);
}

else {
	if (window.onload != null) {
		var oldOnload = window.onload;
		window.onload = function (e) {
			oldOnload(e);
			setupAllTabs();
		};
	}
	else 
		window.onload = setupAllTabs;
}