function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function SetLang(lang) {
    createCookie('language',lang,30);
}

function  CheckLang(thislang, altlang, altpage){
		  var goodlang=true;
		  var cookielang=readCookie('language');
		  if (null != cookielang) {
		    goodlang=(cookielang==thislang);
		  } else {
		    if (navigator.appName == 'Netscape')
		    var language = navigator.language;
		    else
		    var language = navigator.browserLanguage;
		    if (thislang=='nl') {
		  	  if (language.indexOf('nl') == -1) goodlang=false;
			  }
		    else{
		      if (language.indexOf('nl') > -1) goodlang=false;
		    }
		  }
		  if (goodlang==false) {
  		    SetLang(altlang);
		    document.location.href = altpage;
		  } else {
		    SetLang(thislang);
		  }
}