function otevriVrml(){
	sirka_okna=930;
	vyska_okna=780;
	zleva=(screen.width-sirka_okna)/2;
	zhora=(screen.height-vyska_okna)/2;
	okno=window.open("model.php","okno","scrollbars=yes,status=no,resizable=no,location=no");
	okno.resizeTo(sirka_okna,vyska_okna);
	okno.moveTo(zleva,zhora);
}

function install_cortona(aEvent,extName){   
	var params = new Array();
	params[extName] = aEvent.target.href;
	InstallTrigger.install(params);
	return false;
}