function livechat_show(){
	var livechat = document.getElementById('livechat');
  var livechatmain = document.getElementById('livechatmain');
  if (livechatmain.style.display=='none'){
    livechat.className = 'livechat';
    livechatmain.style.display = 'block';
  }
}

function livechat_hide(){
	var livechat = document.getElementById('livechat');
  var livechatmain = document.getElementById('livechatmain');
  //if (livechatmain.style.display=='block'){
  if ((livechat.className=='livechat') || (livechatmain.style.display=='block')){
    livechat.className = 'livechat_sm';
    livechatmain.style.display = 'none';
  }
}

function random_string(chars_number) {
	var chars = "0123456789abcdefghiklmnopqrstuvwxyz";
	var randomstring = '';
	for (var i=0; i<chars_number; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	return randomstring;
}

function show_livechat_window(langid){
  var supp_key = random_string(9);
  window.open('https://support.gvocom.com/support/visitor/index.php?/gvodefault/LiveChat/Chat/Request/_sessionID=sessionid_'+supp_key+'/_proactive=0/_filterDepartmentID=/_randomNumber=doRand_'+supp_key+'/_fullName=/_email=/_promptType=chat/_languageID='+langid, 'livechatwin', 'toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=0,resizable=1,width=600,height=680');
  return true;
}