//change page language 
function lanenru(lan){
var dest = window.location.search;

if(dest=="" || dest==undefined || dest=="?lan=_en" || dest=="?lan=_de" || dest=="?lan=_ru"){dest="?lan="+lan;}
else{
var bigdest = dest.split("&");
if(bigdest[1]=="" || bigdest[1]==undefined || bigdest[1]=="lan=_en" || bigdest[1]=="lan=_de" || bigdest[1]=="lan=_ru"){
bigdest[1]="lan="+lan;}
dest = bigdest.join("&");}

window.location.search = dest;}

//*****************************************************//

//change all links on the page
function mylinks(lan){
if(lan!="_en" && lan!=""){

for(i=0; i<document.links.length; i++){
tail = document.links[i].href.split("?");

if(tail[1]=="" || tail[1]==undefined || tail[1]=="lan="+lan){
		tail[1]="lan="+lan;

}else{
		longtail2 = tail[1].split("&");
		if(longtail2[1]=="" || longtail2[1]==undefined || longtail2[1]=="lan="+lan){
		longtail2[1]="lan="+lan;}
		else{longtail2[1]=longtail2[1]+"&lan="+lan;}

		tail[1] = longtail2.join("&");

}

document.links[i].href = tail.join("?");}

}}