var bInitialised = 0;
var c_firstTab = 0;
var aTabIndices = new Array();
var aCurTabIndex = new Array();
var aLastTab = new Array();
var aImg = new Array();

var DOM = (document.getElementById) ? true : false;
var IE  = (document.all) ? true : false;
var NS4 = (document.layers) ? true : false;

function initTab(sTabName, aIndices, iCurIdx, iTabLast, aImages)
{
	aTabIndices[sTabName] = aIndices;
	aCurTabIndex[sTabName] = ((typeof(iCurIdx)=="undefined") ? 0 : iCurIdx);
	aLastTab[sTabName] = iTabLast;
	aImg[sTabName] = aImages;
	
	bInitialised = 1;
}

function setTabVisible(sTabName, iIdx, bVisible)
{
	var oTab = document.getElementById('tabHandle_'+sTabName+'_'+iIdx);
	var oImg = document.getElementById('tabHandleImg_'+sTabName+'_'+iIdx);
	
	if (bVisible) {
		oTab.style.display='inline';
		oImg.style.display='inline';
	} else {
		oTab.style.display='none';
		oImg.style.display='none';
	}
}
function getTabVisible(sTabName, iIdx)
{
	eval('var sID = aTabIndices_'+sTabName+'[iIdx];');
	var oTab = window.document.getElementById(sID);
	return(oTab.style.display!='none');
}

function changeImage(oImg, sNewSrc)
{
	if(typeof(oImg) == "undefined")
		return;

		oImg.src = sNewSrc;
		oImg.style.visibility = "visible";
		oImg.style.display = "none";
		
		oImg.style.visibility = "visible";
		oImg.style.display = "block";
}

function tabClick(sTabName, iTabIndex_clicked)
{
	if (!bInitialised)
		return false;

	if (DOM) {
		var oTab = window.document.getElementById(aTabIndices[sTabName][iTabIndex_clicked]);
		var oCurTab = window.document.getElementById(aTabIndices[sTabName][aCurTabIndex[sTabName]]);
		var oTd = window.document.getElementById("tabHandle_"+ sTabName + "_" + aCurTabIndex[sTabName]);
	} else if (IE) {
		var oTab = window.document.all(aTabIndices[sTabName][iTabIndex_clicked]);
		var oCurTab = window.document.all(aTabIndices[sTabName][aCurTabIndex[sTabName]]);
		var oTd = window.document.all("tabHandle_"+ sTabName +"_" + aCurTabIndex[sTabName]);
	} else {
		var oTab = eval('window.' + aTabIndices[sTabName][iTabIndex_clicked]);
		var oCurTab = eval('window.' + aTabIndices[sTabName][aCurTabIndex[sTabName]]);
		var oTd = eval("window.tabHandle_"+ sTabName +"_" + aCurTabIndex[sTabName]);
	}
	
	oCurTab.style.display = 'none';
	oTab.style.display = 'block';
	
	oTd.background = aImg[sTabName]["Off"].src;
	switch(aCurTabIndex[sTabName])
	{
		case c_firstTab:
		changeImage(window.document.images['tabImg_' + sTabName +'_first'], aImg[sTabName]["FirstOff"].src);
		changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + (c_firstTab+1) + '\']'), aImg[sTabName]["BetweenOff"].src);
		break;
	case aLastTab[sTabName]:
		changeImage(window.document.images['tabImg_' + sTabName +'_last'], aImg[sTabName]["LastOff"].src);
		changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + aLastTab[sTabName] + '\']'), aImg[sTabName]["BetweenOff"].src);
		break;
	default:
		changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + aCurTabIndex[sTabName] + '\']'), aImg[sTabName]["BetweenOff"].src);
		changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + (aCurTabIndex[sTabName]+1) + '\']'), aImg[sTabName]["BetweenOff"].src);
	}
	switch(iTabIndex_clicked)
	{
		case c_firstTab:
			changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_first\']'), aImg[sTabName]["FirstOn"].src);
			changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + (c_firstTab+1) + '\']'), aImg[sTabName]["BetweenLeftOn"].src);
			break;
		case aLastTab[sTabName]:
			changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + aLastTab[sTabName] + '\']'), aImg[sTabName]["BetweenRightOn"].src);
			changeImage(window.document.images['tabImg_' + sTabName +'_last'], aImg[sTabName]["LastOn"].src);
			break;
		default:
			changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + iTabIndex_clicked + '\']'), aImg[sTabName]["BetweenRightOn"].src);
			changeImage(eval('window.document.images[\'tabImg_' + sTabName +'_' + (iTabIndex_clicked+1) + '\']'), aImg[sTabName]["BetweenLeftOn"].src);
	}
	oTd = window.document.getElementById("tabHandle_"+ sTabName +"_" + iTabIndex_clicked);
	oTd.background = aImg[sTabName]["On"].src;
	aCurTabIndex[sTabName] = iTabIndex_clicked;
	return;
}