function changeLang(oOption, oActLang)
{
	var q			=	String (window.location).split ('?')[1];// parse current url into an array with the keys/values
	if(!q){
		q="";
		window.location	=	'?LANG='	+	oOption; // go go go :D
	}
	else{
		var newq = q.replace('&LANG='+oActLang+'', "").replace('LANG='+oActLang, "");
		if((newq=="")||(newq==null)||(!newq)){
			window.location	=	'?LANG=' + oOption; // go go go :D
		}else
		{
			window.location	=	'?' + newq + '&LANG=' + oOption;
		}
	}
}