function toggleDisplay (id) {
    if (document.getElementById) {
        var obj = document.getElementById(id);
        obj.style.display = (obj.style.display=='block'?'none':'block');
    } else if(document.all) { // IE
        id.style.display = (id.style.display=='block'?'none':'block');
    } else if (document.layers) { // Netscape 4.x
        document.id.style.display = (document.id.style.display=='block'?'none':'block');
    }
} 

function setbookmark(url) {
	if (document.all) {
		window.external.AddFavorite(url, 'Dietzel Hydraulik')
	 } else alert("Bitte die Tastenkombination STRG + D drücken");
}