var Browser_Ok = 	(
		( ( navigator.appName == "Netscape" ) && ( parseInt( navigator.appVersion ) >= 3 ) ) || 
		( ( navigator.appName == "Microsoft Internet Explorer" ) && ( parseInt( navigator.appVersion ) >= 4 ) )
		)
function ChangeImage( idImage, whichImageName )
{
	var whichImage = new Image();
	whichImage.src = whichImageName;
	if ( Browser_Ok )
	{
                	eval( 'document.images[idImage].src = whichImage.src' )
	}
}
function ShowHide_Element( idButton, minButtonName, maxButtonName )
{
	var minButtonImage = new Image();
	minButtonImage.src = minButtonName;
	var maxButtonImage = new Image();
	maxButtonImage.src = maxButtonName;
	var sourceElement = window.event.srcElement;
	var targetElement = document.all[idButton];
	if ( "none" == targetElement.style.display )
	{
		targetElement.style.display = "";
		eval( 'sourceElement.src = minButtonImage.src' ) 
	}
	else
	{
		targetElement.style.display = "none";
		eval( 'sourceElement.src = maxButtonImage.src' )
	}
}
function ShowHide_Section( idSection, idMinButton, idMaxButton )
{
	var targetElement = document.all[idSection];
	var minButtonImage = document.all[idMinButton];
	var maxButtonImage = document.all[idMaxButton];
	if ( "none" == targetElement.style.display)
	{
		targetElement.style.display = "";
		if ( "" != idMinButton )
		{
			minButtonImage.style.display = "none";
		}
		if ( "" != idMaxButton )
		{
			maxButtonImage.style.display = "";
		}
	}
	else
	{
		targetElement.style.display = "none";
		if ( "" != idMinButton )
		{
			minButtonImage.style.display = "";
		}
		if ( "" != idMaxButton )
		{
			maxButtonImage.style.display = "none";
		}
	}
}
function ShowHide_NavBox( idBox )
{
	idMinButton = idBox + 'ImgO';
	idMaxButton = idBox + 'ImgC';
	idMinUrl = idBox + 'UrlO';
	idMaxUrl = idBox + 'UrlC';
	var targetElement = document.getElementById( idBox );
	var minButtonImage = document.getElementById( idMinButton );
	var maxButtonImage = document.getElementById( idMaxButton );
	var minUrl = document.getElementById( idMinUrl );
	var maxUrl = document.getElementById( idMaxUrl );
	if ( "none" == targetElement.style.display) {
		targetElement.style.display = "";
		minButtonImage.style.display = "none";
		maxButtonImage.style.display = "";
		if ( minUrl != null ) {
			minUrl.style.display = "none";
			maxUrl.style.display = "";
		}
		
	} else {
		targetElement.style.display = "none";
		minButtonImage.style.display = "";
		maxButtonImage.style.display = "none";
		if ( minUrl != null ) {
			minUrl.style.display = "";
			maxUrl.style.display = "none";
		}
	}
}
function navBoxSub( idSub )
{
	var i = 0;
	var subMenuItems = document.getElementsByName( "SM_" + idSub );
	if ( subMenuItems[0].style.display == "" )
	{
		for ( i = 0; i < subMenuItems.length; i++ )
		{
			subMenuItems[i].style.display = "none";
		}
	}
	else
	{
		for ( i = 0; i < subMenuItems.length; i++ )
		{
			subMenuItems[i].style.display = "";
		}
	}
	return false;
}
function SendRequestGo( lang )
{
	f = document.forms["SEARCH_FORM"];
	s = Trim( f.QUERY.value );
	strSection = f.SECTION[f.SECTION.selectedIndex].value;
	h = document.location.hostname.toLowerCase();
	if ( ( h.indexOf( ".bvv.cz" ) != -1 ) && ( h.indexOf( "node" ) != -1 ) && ( h != "www.bvv.cz" ) )
	{
		u = "http://www.bvv.cz";
	}
	else
	{
		u = "http://" + h;
	}
	g = "http://dsearch.bvv.cz";
	if ( s == "" || s == "Hledej ..." || s == "Search ..." || s == "Suche ..." )
	{
		if ( lang == "*" )
		{
			document.location.href = u + "/" + strSection + "/WWWAllPHomepagesKey/" + "GB" + "001?OpenDocument";
		} else {
			document.location.href = u + "/" + strSection + "/WWWAllPHomepagesKey/" + lang + "001?OpenDocument";
		}
		return false;
	}
	else
	{
		if ( strSection == "i2000/b-site.nsf" )
		{
			f.action = g + "/" + strSection + "?SearchDomain&Query=(" + escape( s ) + ")%20AND%20(%5B_Title%5D%20CONTAINS%20(LANG" + lang + "%5EFORMDoc%5ESECP))&LANG=" + lang + "&NAV=0&Start=1&Count=10&SearchOrder=1";
			return true;
		}
		else
		{
			f.action = "/" + strSection + "/WWWFulltextDocsByID-" + lang + "?SearchView&LANG=" + lang + "&NAV=1&Start=1&Count=10&SearchOrder=1";
			return true;
		}
	}
}
function SearchFolder( lang, db, folder )
{
	f = document.forms["SEARCH_FOLDER_FORM"];
	s = Trim( f.QUERY.value );
	if ( s != "" )
	{
		f.action = "/" + db + "/" + folder + "?SearchView&LANG=" + lang + "&NAV=1&SEL=" + folder + "&Start=1&Count=10&SearchOrder=1";
		return true;
	}
}
function SendGalleryKey( NameDb, DocID )
{
	f = document.forms["GALLERY_FORM"];
	strSection = f.SOURCE[f.SOURCE.selectedIndex].value;
	if ( Trim( strSection ) == "Default" )
	{
		return false;
	}
	else
	{
		document.location.href = "/" + NameDb + "/WWWAllPDocsID/" + DocID + "?OpenDocument&GAL=" + strSection + "&NAV=1";
		return false;
	}
}
function cstNDFMsg()
{
	var chkH = document.getElementsByTagName( 'h2' );
	if ( chkH.length==1 ) {
		document.getElementById( 'msg' ).style.visibility="visible";
		document.getElementById( 'vwEmbed' ).style.visibility="hidden";
	} else {
		document.getElementById( 'msg' ).style.visibility="hidden";
		document.getElementById( 'vwEmbed' ).style.visibility="visible";
	}
}