function LTrim(str){
   var whitespace = new String(" \t\n\r");

   var s = new String(str);

   if (whitespace.indexOf(s.charAt(0)) != -1) {
      var j=0, i = s.length;
      while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
         j++;
     
      s = s.substring(j, i);
   }
   return s;
}

function RTrim(str){
   var whitespace = new String(" \t\n\r");

   var s = new String(str);

   if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
      var i = s.length - 1;       // Get length of string
      while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
         i--;
      s = s.substring(0, i+1);
   }
   return s;
}

function Trim(str){
   return RTrim(LTrim(str));
}

function chLang(lang) {
	var currentPath=location.href.toString();
	var switchTc='/tc/';
	var switchEn='/en/';
	var switchSc='/sc/';
	lang = '/'+lang+'/';

	switch (lang){
		case '/en/':
			currentPath=currentPath.replace(switchTc, switchEn);
			currentPath=currentPath.replace(switchSc, switchEn);
			break;
		case '/tc/':
			currentPath=currentPath.replace(switchEn, switchTc);
			currentPath=currentPath.replace(switchSc, switchTc);
			break;
		case '/sc/':
			currentPath=currentPath.replace(switchEn, switchSc);
			currentPath=currentPath.replace(switchTc, switchSc);
			break;	
		default:
	}

	document.location=currentPath;
}