function DocFileNameExtract()
{
   wholeurl = window.location.href;
   x = wholeurl.length;
   while((wholeurl.substring(x,x-1)) != "/"){ x--; } clipstart = x;
   return wholeurl.substring(wholeurl.length,clipstart);
}

function ChangeLangE()
{
	var langpath = "ht"
	var langpath1 = "tp://www.sfat.gov.hk/english/"
	window.location = langpath + langpath1 + folder() + DocFileNameExtract();
}

function ChangeLangTC()
{
	var langpath = "ht"
	var langpath1 = "tp://www.sfat.gov.hk/chinese/"
	window.location = langpath + langpath1 + folder() + DocFileNameExtract();
}

function ChangeLangSC()
{
	var langpath = "ht"
	var langpath1 = "tp://www.sfat.gov.hk/schinese/"
	window.location = langpath + langpath1 + folder() + DocFileNameExtract();
}