var disabled=false;

function imgOn(Img)
{
    var newSrc=new String(Img);
	if(!disabled) newSrc=newSrc.replace(".gif", "_o.gif");

	return newSrc;
}

function imgOff(Img)
{
    var newSrc=new String(Img);
	if(!disabled) newSrc=newSrc.replace("_o.gif", ".gif");

	return newSrc;
}

var srvTC = 'http://www.epd.gov.hk/epd/misc/er/er2006/';
var srvSC = 'http://sc.info.gov.hk/gb/www.epd.gov.hk/epd/misc/er/er2006/';

function isSC()
{
	return (window.location.href.indexOf(srvSC)==0);
}

function func1()
{
	var BIG5='tc_chi';
	var ENG='english';
 	var filename=window.location.pathname.substr(window.location.pathname.lastIndexOf('/')+1);

	if (isSC())
        	window.location= srvTC+'english/'+filename;
	else	
		window.location=(window.location.pathname.indexOf('english')!=-1)?window.location.pathname.replace(ENG,BIG5):window.location.pathname.replace(BIG5,ENG);

	return false;
}

function func2()
{
	var filename=window.location.pathname.substr(window.location.pathname.lastIndexOf('/')+1);

	window.location= (isSC()?srvTC+'tc_chi/':srvSC+'sc_chi/') +filename;	

	return false;
}