function haendlerDetails() {
  document.getElementById('details').src = "haendler_detail.php?id=" + document.getElementById('haendler').options[document.getElementById('haendler').selectedIndex].value + "";
}

function openwindow(strurl, strname, intwidth, intheight) {
  var windowleft = (screen.width / 2) - (intwidth / 2);
  var windowtop = (screen.height / 2) - (intheight / 2);
  var newwin = window.open(strurl, strname, 'width=' + intwidth + ', height=' + intheight + ', left=' + windowleft + ', top=' + windowtop);
  newwin.focus();
}

function print_haendler() {
  var newwin = window.open("haendler_detail_print.php?id=" + document.getElementById('haendler').options[document.getElementById('haendler').selectedIndex].value + "", "Print", "width=300, height=300");
  newwin.focus();
  newwin.print();
}