function setHomePage(obj) {

    var ua = navigator.userAgent.toLowerCase();
    if ( (ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1) ){
          obj.setAttribute('href','javascript:void(0)');
          obj.style.behavior='url(#default#homepage)';
          obj.setHomePage('http://www.czechvirtuosi.cz');
    }

    return false;
  }

 function openWindow(whr){

   window.open(whr,'_blank','width=870,height=450,menubar=1,scrollbars=1,resizable=1,toolbar=0,location=0,directories=0,status=0,left=30,top=20');

   return false;
 }