var textPadding = 3; // Padding at the left of tab text - bigger value gives you wider tabs
var strictDocType = true; 
var tabView_maxNumberOfTabs = 6;	// Maximum number of tabs

/* Don't change anything below here */
var faculty_tabObj = new Array();
var activeTabIndex = new Array();
var MSIE = navigator.userAgent.indexOf('MSIE')>=0?true:false;

var regExp = new RegExp(".*MSIE ([0-9]\.[0-9]).*","g");
var navigatorVersion = navigator.userAgent.replace(regExp,'$1');

var ajaxObjects = new Array();
var tabView_countTabs = new Array();
var tabViewHeight = new Array();
var tabDivCounter = 0;
var closeImageHeight = 8;	// Pixel height of close buttons
var closeImageWidth = 8;	// Pixel height of close buttons


function setPadding(obj,padding){
	var span = obj.getElementsByTagName('SPAN')[0];
	span.style.paddingLeft = padding + 'px';	
	span.style.paddingRight = padding + 'px';	
}

function showTab(parentId,tabIndex)
{
	var parentId_div = parentId + "_";
	if(!document.getElementById('tabView' + parentId_div + tabIndex)){
		return;
	}
	if(activeTabIndex[parentId]>=0){
		if(activeTabIndex[parentId]==tabIndex){
			return;
		}

		var obj = document.getElementById('tabTab'+parentId_div + activeTabIndex[parentId]);

		obj.className='tabInactive';
		var img = obj.getElementsByTagName('IMG')[0];
		if(img.src.indexOf('tab_')==-1)img = obj.getElementsByTagName('IMG')[1];
		img.src = 'images/Tab_Menu/tab_right_inactive.gif';
		document.getElementById('tabView' + parentId_div + activeTabIndex[parentId]).style.display='none';
	}

	var thisObj = document.getElementById('tabTab'+ parentId_div +tabIndex);	

	thisObj.className='tabActive';
	var img = thisObj.getElementsByTagName('IMG')[0];
	if(img.src.indexOf('tab_')==-1)img = thisObj.getElementsByTagName('IMG')[1];
	img.src = 'images/Tab_Menu/tab_right_active.gif';

	document.getElementById('tabView' + parentId_div + tabIndex).style.display='block';
	activeTabIndex[parentId] = tabIndex;


	var parentObj = thisObj.parentNode;
	var aTab = parentObj.getElementsByTagName('DIV')[0];
	countObjects = 0;
	var startPos = 2;
	var previousObjectActive = false;
	while(aTab){
		if(aTab.tagName=='DIV'){
			if(previousObjectActive){
				previousObjectActive = false;
				startPos-=2;
			}
			if(aTab==thisObj){
				startPos-=2;
				previousObjectActive=true;
				setPadding(aTab,textPadding+1);
			}else{
				setPadding(aTab,textPadding);
			}

			aTab.style.left = startPos + 'px';
			countObjects++;
			startPos+=2;
		}			
		aTab = aTab.nextSibling;
	}

	return;
}

function tabClick()
{
	var idArray = this.id.split('_');		
	showTab(this.parentNode.parentNode.id,idArray[idArray.length-1].replace(/[^0-9]/gi,''));

}

function rolloverTab()
{
	if(this.className.indexOf('tabInactive')>=0){
		this.className='inactiveTabOver';
		var img = this.getElementsByTagName('IMG')[0];
		if(img.src.indexOf('tab_')<=0)img = this.getElementsByTagName('IMG')[1];
		img.src = 'images/Tab_Menu/tab_right_over.gif';
	}

}
function rolloutTab()
{
	if(this.className ==  'inactiveTabOver'){
		this.className='tabInactive';
		var img = this.getElementsByTagName('IMG')[0];
		if(img.src.indexOf('tab_')<=0)img = this.getElementsByTagName('IMG')[1];
		img.src = 'images/Tab_Menu/tab_right_inactive.gif';
	}

}

function hoverTabViewCloseButton()
{
	this.src = this.src.replace('close.gif','close_over.gif');
}

function stopHoverTabViewCloseButton()
{
	this.src = this.src.replace('close_over.gif','close.gif');
}

function initTabs(mainContainerID,tabTitles,activeTab,width,height,closeButtonArray,additionalTab)
{
	if(!closeButtonArray)closeButtonArray = new Array();

	if(!additionalTab || additionalTab=='undefined'){			
		faculty_tabObj[mainContainerID] = document.getElementById(mainContainerID);
		width = width + '';
		if(width.indexOf('%')<0)width= width + 'px';
		faculty_tabObj[mainContainerID].style.width = width;

		height = height + '';
		if(height.length>0){
			if(height.indexOf('%')<0)height= height + 'px';
			faculty_tabObj[mainContainerID].style.height = height;
		}


		tabViewHeight[mainContainerID] = height;

		var tabDiv = document.createElement('DIV');		
		var firstDiv = faculty_tabObj[mainContainerID].getElementsByTagName('DIV')[0];	

		faculty_tabObj[mainContainerID].insertBefore(tabDiv,firstDiv);	
		tabDiv.className = 'faculty_tabPane';			
		tabView_countTabs[mainContainerID] = 0;

	}else{
		var tabDiv = faculty_tabObj[mainContainerID].getElementsByTagName('DIV')[0];
		var firstDiv = faculty_tabObj[mainContainerID].getElementsByTagName('DIV')[1];
		height = tabViewHeight[mainContainerID];
		activeTab = tabView_countTabs[mainContainerID];		


	}



	for(var no=0;no<tabTitles.length;no++){
		var aTab = document.createElement('DIV');
		aTab.id = 'tabTab' + mainContainerID + "_" +  (no + tabView_countTabs[mainContainerID]);
		aTab.onmouseover = rolloverTab;
		aTab.onmouseout = rolloutTab;
		aTab.onclick = tabClick;
		aTab.className='tabInactive';
		tabDiv.appendChild(aTab);
		var span = document.createElement('SPAN');
		span.innerHTML = tabTitles[no];
		span.style.position = 'relative';
		aTab.appendChild(span);

		if(closeButtonArray[no]){
			var closeButton = document.createElement('IMG');
			closeButton.src = 'images/close.gif';
			closeButton.height = closeImageHeight + 'px';
			closeButton.width = closeImageHeight + 'px';
			closeButton.setAttribute('height',closeImageHeight);
			closeButton.setAttribute('width',closeImageHeight);
			closeButton.style.position='absolute';
			closeButton.style.top = '6px';
			closeButton.style.right = '0px';
			closeButton.onmouseover = hoverTabViewCloseButton;
			closeButton.onmouseout = stopHoverTabViewCloseButton;

			span.innerHTML = span.innerHTML + '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';	

			var deleteTxt = span.innerHTML+'';

			closeButton.onclick = function(){ deleteTab(this.parentNode.innerHTML) };
			span.appendChild(closeButton);
		}

		var img = document.createElement('IMG');
		img.valign = 'bottom';
		img.src = 'images/Tab_Menu/tab_right_inactive.gif';
		// IE5.X FIX
		if((navigatorVersion && navigatorVersion<6) || (MSIE && !strictDocType)){
			img.style.styleFloat = 'none';
			img.style.position = 'relative';	
			img.style.top = '4px'
			span.style.paddingTop = '4px';
			aTab.style.cursor = 'hand';
		}	// End IE5.x FIX
		aTab.appendChild(img);
	}

	var tabs = faculty_tabObj[mainContainerID].getElementsByTagName('DIV');
	var divCounter = 0;
	for(var no=0;no<tabs.length;no++){
		if(tabs[no].className=='faculty_aTab' && tabs[no].parentNode.id == mainContainerID){
			if(height.length>0)tabs[no].style.height = height;
			tabs[no].style.display='none';
			tabs[no].id = 'tabView' + mainContainerID + "_" + divCounter;
			divCounter++;
		}			
	}	
	tabView_countTabs[mainContainerID] = tabView_countTabs[mainContainerID] + tabTitles.length;	
	showTab(mainContainerID,activeTab);

	return activeTab;
}	

function showAjaxTabContent(ajaxIndex,parentId,tabId)
{
	var obj = document.getElementById('tabView'+parentId + '_' + tabId);
	obj.innerHTML = ajaxObjects[ajaxIndex].response;		
}

function getTabIndexByTitle(tabTitle)
{
	var regExp = new RegExp("(.*?)&nbsp.*$","gi");
	tabTitle = tabTitle.replace(regExp,'$1');
	for(var prop in faculty_tabObj){
		var divs = faculty_tabObj[prop].getElementsByTagName('DIV');
		for(var no=0;no<divs.length;no++){
			if(divs[no].id.indexOf('tabTab')>=0){
				var span = divs[no].getElementsByTagName('SPAN')[0];
				var regExp2 = new RegExp("(.*?)&nbsp.*$","gi");
				var spanTitle = span.innerHTML.replace(regExp2,'$1');

				if(spanTitle == tabTitle){

					var tmpId = divs[no].id.split('_');						
					return Array(prop,tmpId[tmpId.length-1].replace(/[^0-9]/g,'')/1);
				}		
			}
		}
	}

	return -1;

}

/* Call this function if you want to display some content from external file in one of the tabs 
Arguments: Title of tab and relative path to external file */

function addAjaxContentToTab(tabTitle,tabContentUrl)
{
	var index = getTabIndexByTitle(tabTitle);
	if(index!=-1){
		var ajaxIndex = ajaxObjects.length;

		tabId = index[1];
		parentId = index[0];


		ajaxObjects[ajaxIndex] = new sack();
		ajaxObjects[ajaxIndex].requestFile = tabContentUrl;	// Specifying which file to get

		ajaxObjects[ajaxIndex].onCompletion = function(){ showAjaxTabContent(ajaxIndex,parentId,tabId); };	// Specify function that will be executed after file has been found
		ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function				

	}	
}