if (End < Start)
			return href.substring(0, Start)
		else
		return href.substring(0, End)
	}
	return '';
}
function GetTags(base,tag)
{
	if(g_supportsPPTHTML) return base.all.tags(tag);
	else return base.getElementsByTagName(tag);
}
function UpdNtsPane(){ if(frames["PPTNts"]) PPTNts.location.replace( MHTMLPrefix+GetHrefObj( gCurSld ).mNtsHref ) }
function UpdNavPane( sldIndex ){ if(gNavLoaded) PPTNav.UpdNav() }
function UpdOtNavPane(){ if(gOtlNavLoaded) PPTOtlNav.UpdOtlNav() }
function UpdOtlPane(){ if(gOtlLoaded) PPTOtl.UpdOtl() }
function SetHasNts( fVal )
{
	if( gHasNts != fVal ) {
		gHasNts=fVal
		UpdNavPane()
	}
}
function ToggleOtlText()
{
	gOtlTxtExp=!gOtlTxtExp
	UpdOtlPane()
}
function ToggleOtlPane()
{
	frmset=document.all("PPTHorizAdjust")
	frm=document.all("PPTOtl")
	if( gOtlOpen )
		frmset.cols="*,100%"
	else
		frmset.cols="25%,*"
	gOtlOpen=!gOtlOpen
	frm.noResize=!frm.noResize
	UpdOtNavPane()
}
function ToggleNtsPane()
{
	frmset=document.all("PPTVertAdjust")
	frm=document.all("PPTNts")
	if( gNtsOpen )
		frmset.rows="100%,*"
	else
		frmset.rows="*,20%"
	gNtsOpen=!gNtsOpen
	UpdNtsPane()
}
function ClearMedia()
{
	if (PPTSld.pptSound) PPTSld.pptSound.loop = 0;
}
function FullScreen()
{
	if ( PPTSld.g_animUseRuntime )
		PPTSld.document.body.pause();
	ClearMedia();
	var href = ( document.location.protocol == 'mhtml:') ? FULLSCR_HREF : FULLSCR_HREF+"#"+GetHrefObj(gCurSld).mSldHref;
	if(PPTNav.event.ctrlKey) {
		var w = (window.screen.availWidth * 1.0) / 2.0
		var h = w * (PPTSld.g_origH * 1.0) / PPTSld.g_origW
		win = window.open( MHTMLPrefix+href,null,"toolbar=0,resizable=1,top=0,left=0," + "width="+ w + ",height=" + h );
		if( PPTSld.g_animUseRuntime )
			win.document.body.PPTSldFrameset=window;
	}
	else
	{
		win = window.open( MHTMLPrefix+href,null,"fullscreen=yes" );
		if( PPTSld.g_animUseRuntime )
			win.document.body.PPTSldFrameset=window;
	}
}
function ToggleVNarration()
{
	rObj=PPTSld.document.all("NSPlay")
	if( rObj && !PPTSld.g_animUseRuntime ) {
		if( (rObj.playState == 1)||(rObj.playState == 0) )
			rObj.Play()
		else if( rObj.playState == 2 )
			rObj.Pause()
		else
			return;
	}
	else if( PPTSld.g_animUseRuntime )
	{
		narObj = PPTSld.document.all("narrationID")
		if( narObj )
			narObj.togglePause()
	}
}
function GetCurSldNum()
{
	obj=GetHrefObj(gCurSld)
	if( obj.mOrigVis == 1 )
		return obj.mSldIdx
	else
		return gCurSld
}
function GetNumSlds()
{
	if( GetHrefObj(gCurSld).mOrigVis == 1 )
		return GetSldList().mNumVisSlds;
	else
		return GetSldList().mList.length
}
function GetSldNum( href )
{
	for(ii=0; ii<GetSldList().mList.length; ii++) {
		if ( GetSldList().mList[ii].mSldHref == href )
			return ii+1
	}
	return 1
}
function GetHrefObj( sldIdx ){ return GetSldList().mList[sldIdx-1] }
function IsFramesMode(){ return ( SCREEN_MODE == "Frames" ) }
function IsFullScrMode(){ return ( SCREEN_MODE == "FullScreen" ) }
function GoToNextSld()
{
	ii=gCurSld + 1
	if( GetHrefObj( ii-1 ).mOrigVis == 0 ) {
		if( ii<=GetSldList().mList.length ) {
			obj=GetHrefObj(ii)
			obj.mVis=1
			GoToSldNum(ii)
			return
		}
	}
	else {
		obj=GetHrefObj( ii )
		while ( obj && ( obj.mOrigVis == 0 ) )
			obj=GetHrefObj(++ii)
		if( obj && obj.mOrigVis ) {
			GoToSldNum(ii)
			return
		}
	}
	if( gSldStack.length > 1 )
		PopSldList();
	else if( !IsFramesMode() ) {
                if( gLoopCont )
			GoToFirst()
                else
			EndShow()
	}
}
function GoToPrevSld()
{
	ii=gCurSld-1
	if( ii > 0 ) {
		obj=GetHrefObj(ii)
		while ( obj && ( obj.mVis == 0 ) && ( ii>0 ) )
			obj=GetHrefObj(--ii)
        if( ii == 0 ) ii=1
		GoToSldNum(ii)
	}
}
function GoToFirst(){ GoToSld( GetHrefObj(1).mSldHref ) }
function GoToLast()
{
	ii=GetSldList().mList.length
	if( ii != gCurSld )
		GoToSld( GetHrefObj(ii).mSldHref )
}
function GoToSldNum( num )
{
	if( PPTSld.event ) PPTSld.event.cancelBubble=true
	obj = GetHrefObj( num )
	obj.mVis=1
	gPrevSld=gCurSld
	gCurSld = num;
	PPTSld.location.replace(MHTMLPrefix+obj.mSldHref)
	if( IsFramesMode() ) {
		UpdNavPane(); UpdOtlPane(); UpdNtsPane()
	}
}
function GoToSld( href )
{
	if( PPTSld.event ) PPTSld.event.cancelBubble=true
	GetHrefObj( GetSldNum(href) ).mVis=1
	PPTSld.location.replace(MHTMLPrefix+href)
}
function SldUpdated( id )
{
	if( id == GetHrefObj(gCurSld).mSldHref ) return
	gPrevSld=gCurSld
	gCurSld=GetSldNum(id)
	if( IsFramesMode() ) {
		UpdNavPane(); UpdOtlPane(); UpdNtsPane()
	}
}
function PrevSldViewed(){ GoToSld( GetHrefObj(gPrevSld).mSldHref ) }
function HasPrevSld() { return ( gIsEndShow || ( gCurSld != 1 && GetHrefObj( gCurSld-1 ).mVis == 1 )||( GetCurSldNum() > 1 ) ) }
function HasNextSld() { return (GetCurSldNum() != GetNumSlds()) }
function CloseWindow() {
	if( HideMenu() ) return;
	var event = PPTSld.event;
	if( !IsFramesMode() && event && (event.keyCode==27 || event.keyCode==32 || event.type=="click" ) )
		window.close( self );
	CatchNumKeys( self, event );
}
function Unload() { gIsEndShow=0; }
function SetupEndShow() {
	gIsEndShow=1;
	PPTSld.document.body.scroll="no";
	PPTSld.document.onkeypress=CloseWindow;
	PPTSld.document.onclick=CloseWindow;
	PPTSld.document.oncontextmenu=_CM;
}
function EndShow()
{
	if( IsFramesMode() ) return
	if( PPTSld.event ) PPTSld.event.cancelBubble=true
	doc=PPTSld.document
	doc.open()
	doc.writeln('<html><body bgcolor=black onload=parent.SetupEndShow() onunload=parent.Unload()><center><p><font face=Tahoma color=white size=2><br><b>' + ENDSHOW_MESG + '</b></font></p></center></body></html>')
	doc.close()
}
function SetSldVisited(){ GetSldList().mList[gCurSld-1].mVisited=true }
function IsSldVisited(){ return GetSldList().mList[gCurSld-1].mVisited }
function hrefList( sldHref, visible, advDelay, advClk )
{
	this.mSldHref= this.mNtsHref = sldHref
	this.mOrigVis= this.mVis = visible
	this.mVisited= false
	this.mAdvDelay= advDelay
	this.mAdvOnClk= advClk
}
function SldList(arr,curSld,fEnd)
{
	this.mCurSld = curSld;
	this.mList = new Array();
	var idx = 1;
	for(ii=0;ii<arr.length;ii++) {
		this.mList[ii] = new hrefList( arr[ii].mSldHref, arr[ii].mOrigVis, arr[ii].mAdvDelay, arr[ii].mAdvOnClk );
		if( arr[ii].mOrigVis )
			this.mList[ii].mSldIdx = idx++;
	}
	this.mNumVisSlds = idx-1;
	this.fEndShow = fEnd;
}
function GetSldList() {	return gSldStack[gSldStack.length-1] }
function GetCurSld() { return parent.GetSldList().mList[parent.gCurSld - 1] }
gSldStack = new Array();
gSldStack[0] = new SldList(gMainDoc,gCurSld,1)
function ViewCustomShow(idx,fEnd)
{
	if( !IsFullScrMode() ) return;
	var sldList = new Array();
	var custShow = custShowList[idx-1];
	var jj = 0;
	for( ii=0;ii<custShow.length;ii++ ) {
		if( custShow[ii] <= gMainDoc.length )
			sldList[jj++] = gMainDoc[custShow[ii]-1];
	}
	if (sldList.length > 0) {
	PushSldList(sldList,fEnd);
	gCurSld = 1;
	}
	else
		if( PPTSld.event ) PPTSld.event.cancelBubble=true
}
function PushSldList(arr,fEnd) {
	var ii = gSldStack.length;
	gSldStack[ii] = new SldList(arr,gCurSld,fEnd);
	GoToSld( gSldStack[ii].mList[0].mSldHref );
}
function PopSldList() {
	if (gSldStack[gSldStack.length-1].fEndShow)
		EndShow()
	else {
	gCurSld = gSldStack[gSldStack.length-1].mCurSld;
	gSldStack[gSldStack.length-1] = null;
	gSldStack.length--;
	var sldList = gSldStack[gSldStack.length-1];
	GoToSld( sldList.mList[gCurSld - 1].mSldHref );
	}
}
var custShowList=new Array();
function ImgBtn( oId,bId,w,action )
{
	var t=this
	t.Perform    = _IBP
	t.SetActive  = _IBSetA
	t.SetInactive= _IBSetI
	t.SetPressed = _IBSetP
	t.SetDisabled= _IBSetD
	t.Enabled    = _IBSetE
	t.ChangeIcon = null
	t.UserAction = action
	t.ChgState   = _IBUI
	t.mObjId   = oId
	t.mBorderId= bId