function myOpen(file_name) {
  window.location.href = file_name;
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages(img_id, img_src) {
	if (document.images && (preloadFlag == true)) {
		document.getElementById(img_id).src = img_src;
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		mi_01_over = newImage("images/mi_home_.gif");
		mi_02_over = newImage("images/mi_team_.gif");
		mi_03_over = newImage("images/mi_refs_.gif");
		mi_04_over = newImage("images/mi_hotel_.gif");
		mi_05_over = newImage("images/mi_contact_.gif");
		mi_06_over = newImage("images/mi_imprint_.gif");
		preloadFlag = true;
	}
}

function outline(id) {
 if(document.getElementById(id).style.display == 'none') {
 	// sichtbar machen
  document.getElementById(id).style.display = 'inline';
  document.getElementById(id+'icon').innerHTML = '-';
 } else {
 	// verstecken
  document.getElementById(id).style.display = 'none';
  document.getElementById(id+'icon').innerHTML = '+';
 }
}