// Global variable
var __m_arImages=null;				// array to contain image name list.
var __m_nCurItem=-1;				// currently, selected menu index.
var __m_preSelectedButton=null;		// previous, selected button
var __m_preSelectedButtonIndex=-1;	// previous, selected button index.
var __IsIE = (document.all);


// set Image name list function.
function setImages(arImages)
{
	__m_arImages=arImages;	
}


// highlight Item function
function HighlightItem(nItemIndex,img)
{
	var imgCtl=document[img];
	
	if (__m_nCurItem!=nItemIndex)
	{
		imgCtl.src=__m_arImages[nItemIndex]+'_b.gif';
	}
	else
	{
		imgCtl.src=__m_arImages[nItemIndex]+'_b.gif';
	}
}

// restore Item function
function RestoreItem(nItemIndex,img)
{
	var imgCtl=document[img];
	if (__m_nCurItem!=nItemIndex)
	{
		imgCtl.src=__m_arImages[nItemIndex]+'.gif';
	}
	else
	{
		imgCtl.src=__m_arImages[nItemIndex]+'_b.gif';
	}
}

// set current item function
function setCurItem(nItemIndex,img)
{

	var imgCtl=document[img];
	imgCtl.src=__m_arImages[nItemIndex]+'_b.gif';
	
	if (__m_preSelectedButton!=null) __m_preSelectedButton.src=__m_arImages[__m_preSelectedButtonIndex]+'.gif';
	
	__m_preSelectedButton=imgCtl;
	__m_preSelectedButtonIndex=nItemIndex;

	__m_nCurItem=nItemIndex;
	
}

// change frame content function
function changeFrame(strFrame,strUrl)
{
	window.top.frames[strFrame].location.href=strUrl;
}

// item selected function
function itemSelected(nItemIndex,img,bodyFrame,bodyURL)
{
	setCurItem(nItemIndex,img);
	changeFrame(bodyFrame,bodyURL);
}