function colchange(country) {
     var tobe = document.getElementById('overlay');
     var cou = document.getElementById(country);
     if(!window.XMLHttpRequest) {
       tobe.style.backgroundImage = 'url(/en/images/kartes/gifmaps/' + country + '.gif)';
     }
     else {
       tobe.style.backgroundImage = 'url(/en/images/kartes/' + country + '.png)';
     }
     cou.style.color = '#c1a300';
     cou.style.textDecoration = 'underline';
   }
   function colclar(country) {
     var tobe = document.getElementById('overlay')
     var cou = document.getElementById(country);
     tobe.style.backgroundImage = 'url(/en/images/kartes/blank.gif)';
     cou.style.color = '';
     cou.style.textDecoration = 'none';
   }