/*----------------------------------------------------------------------------\
|                               Tab Pane 1.02                                 |
|-----------------------------------------------------------------------------|
|                         Created by Erik Arvidsson                           |
|                  (http://webfx.eae.net/contact.html#erik)                   |
|                      For WebFX (http://webfx.eae.net/)                      |
|-----------------------------------------------------------------------------|
|                Copyright (c) 2002, 2003, 2006 Erik Arvidsson                |
|-----------------------------------------------------------------------------|
| Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| use this file except in compliance with the License.  You may obtain a copy |
| of the License at http://www.apache.org/licenses/LICENSE-2.0                |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| Unless  required  by  applicable law or  agreed  to  in  writing,  software |
| distributed under the License is distributed on an  "AS IS" BASIS,  WITHOUT |
| WARRANTIES OR  CONDITIONS OF ANY KIND,  either express or implied.  See the |
| License  for the  specific language  governing permissions  and limitations |
| under the License.                                                          |
|-----------------------------------------------------------------------------|
| 2002-01-?? | First working version                                          |
| 2002-02-17 | Cleaned up for 1.0 public version                              |
| 2003-02-18 | Changed from javascript uri for anchors to return false        |
| 2003-03-03 | Added dispose methods to release IE memory                     |
| 2006-05-28 | Changed license to Apache Software License 2.0.                |
|-----------------------------------------------------------------------------|
| Dependencies: *.css           a css file to define the layout               |
|-----------------------------------------------------------------------------|
| Created 2002-01-?? | All changes are in the log above. | Updated 2006-05-28 |
\----------------------------------------------------------------------------*/
var pageAll;	//holder variable for all pages
var timer;  //timer for the animation interval 
var currentElement; //holder variaable for currently selected tab
var tabCount = 0;	//incrementing counter for each tab id;
// This function is used to define if the browser supports the needed
// features
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 )
			
	// IE55 has a serious DOM1 bug... Patch it!
	if ( ie55 ) {
		document._getElementsByTagName = document.getElementsByTagName;
		document.getElementsByTagName = function ( sTagName ) {
			if ( sTagName == "*" )
				return document.all;
			else
				return document._getElementsByTagName( sTagName );
		};
	}

	return hasSupport.support;
}

///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab panes
//
// el : HTMLElement		The html element used to represent the tab pane
// bUseCookie : Boolean	Optional. Default is true. Used to determine whether to us
//						persistance using cookies or not
//
function WebFXTabPane( 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;
	
	// add class name tag to class name
	this.element.className = this.classNameTag + " " + this.element.className;
	
	// add tab row
	this.tabRow = document.createElement( "div" );
	this.tabRow.className = "tab-row";
	this.tabRow.id = "tab-row";
	el.insertBefore( this.tabRow, el.firstChild );

	var tabIndex = 0;

		tabIndex = Number( WebFXTabPane.getCookie( "webfxtab_" + this.element.id ) );

		if ( isNaN( tabIndex ) )
			tabIndex = 0;
			
	this.selectedIndex = tabIndex;

	
	// loop through child nodes and add them
	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] );
		}
	}
	parent.setMax(cs.length);
		parent.hideArrows(this.selectedIndex);	//select the correct arrows in the parent frame		
		parent.setButton(mod[this.selectedIndex]);
}

WebFXTabPane.prototype.classNameTag = "dynamic-tab-pane-control";

WebFXTabPane.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();
    	WebFXTabPane.setCookie( "webfxtab_" + this.element.id, n);	// session cookie
    		parent.hideArrows(this.selectedIndex);//select the correct arrows in the parent frame
			parent.setButton(mod[this.selectedIndex]);    		
	}
};
	
WebFXTabPane.prototype.getSelectedIndex = function () {
	return this.selectedIndex;
};

WebFXTabPane.prototype.addTabPage = function ( oElement ) {
	if ( !hasSupport() ) return;
	
	if ( oElement.tabPage == this )	// already added
		return oElement.tabPage;

    pageAll = this.pages;   //place pages into holder variable
	var n = this.pages.length;
	var tp = this.pages[n] = new WebFXTabPage( oElement, this, n );
	tp.tabPane = this;
	tp.id = "tab"+tabCount++;
	
	// move the tab out of the box
	this.tabRow.appendChild( tp.tab );
	
	//scrolling implementation
	tp.element.style.position = "absolute";
	tp.element.style.top = "19px";
	tp.element.style.left = "0px";
	//tp.element.style.width = "300px";
	//tp.element.style.height = "500px";
	//move to just the right of current image
	if (this.pages.length > 1) {  
	   tp.element.style.left = (parseInt(this.pages[this.pages.length-2].element.style.left) + 350) + "px";
    }
			
	if ( n == this.selectedIndex )
		tp.show();
	else
		tp.hide();
		
	return tp;
};
	
WebFXTabPane.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;
};



// Cookie handling
WebFXTabPane.setCookie = function ( sName, sValue, nDays ) {
	var expires = "";
	var d = new Date();
	d.setTime(2112607400300); //expire in December 2036
	expires = "; expires=" + d.toGMTString();

	document.cookie = sName + "=" + sValue + expires + "; path=/" + "; domain="+window.location.hostname;
};

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

WebFXTabPane.removeCookie = function ( name ) {
	setCookie( name, "", -1 );
};








///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab pages. This one should not be used.
// Use WebFXTabPage.addTabPage instead
//
// el : HTMLElement			The html element used to represent the tab pane
// tabPane : WebFXTabPane	The parent tab pane
// nindex :	Number			The index of the page in the parent pane page array
//
function WebFXTabPage( 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;
		}
	}
	
	// insert a tag around content to support keyboard navigation
	
	
	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 );

	
	// hook up events, using DOM0
	var oThis = this;
	this.tab.onclick = function () { oThis.select(); };
	this.tab.onmouseover = function () { WebFXTabPage.tabOver( oThis ); };
	this.tab.onmouseout = function () { WebFXTabPage.tabOut( oThis ); };

}

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

   clearInterval(timer);
   currentElement = this.element;
   leftError = parseInt(currentElement.style.left);
    if (leftError < 0) leftError = leftError * (-1);
    if (leftError > 350) displacement = 50;
    else displacement = 25;
    
//   clearInterval(timer); 	//cancel any existing timers
   timer = setInterval("moveToMiddle("+displacement+")", 40);
}

function moveToMiddle(displacement) {
    if (parseInt(currentElement.style.left) == 25) displacement = 25;
    if (parseInt(currentElement.style.left) == (-25)) displacement = 25;
    
     if (parseInt(currentElement.style.left) > 0) {
               for(var i=0; i < pageAll.length; i++) {
                   pageAll[i].element.style.left = (parseInt(pageAll[i].element.style.left) - displacement) + "px";
               }
        }

        if (parseInt(currentElement.style.left) < 0) {
               for(var i=0; i < pageAll.length; i++) {
                   pageAll[i].element.style.left = (parseInt(pageAll[i].element.style.left) + displacement) + "px";
               }
        }
        if (parseInt(currentElement.style.left) == 0) {
            clearInterval(timer);
        }
}

WebFXTabPage.prototype.hide = function () {
	var el = this.tab;
	var s = el.className;
	s = s.replace(/ selected/g, "");
	el.className = s;
//stop the hidding for slide effect
//	this.element.style.display = "none";
};
	
WebFXTabPage.prototype.select = function () {
	this.tabPane.setSelectedIndex( this.index );
};

WebFXTabPage.prototype.selectNext = function () {
    var currentSelection = this.tabPane.selectedIndex;
    if (currentSelection < (this.tabPane.pages.length-1)) {
       	this.tabPane.setSelectedIndex( currentSelection+1 );
    }
    return currentSelection;
}

WebFXTabPage.prototype.selectPrevious = function () {
    var currentSelection = this.tabPane.selectedIndex;
    if (currentSelection > 0) {
       	this.tabPane.setSelectedIndex( currentSelection-1 );
    }
    return currentSelection;
}
	
WebFXTabPage.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;
};

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

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


// This function initializes all uninitialized tab panes and tab pages
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;

		// no className
		if ( cn == "" ) continue;
		
		// uninitiated tab pane
		if ( tabPaneRe.test( cn ) && !el.tabPane )
			new WebFXTabPane( el );
	
		// unitiated tab page wit a valid tab pane parent
		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;

		// no className
		if ( cn == "" ) continue;
		
		// tab pane
		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;
	}
}


// initialization hook up

// DOM2
if ( typeof window.addEventListener != "undefined" )
	window.addEventListener( "load", setupAllTabs, false );

// IE 
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;
}