function spracheStart()
//alert("hallo ich werde aufgerufen");
{
    if(navigator.appName=='Netscape'||navigator.appName=='Opera'){
		
        if (navigator.language.indexOf("de") > -1) {
            document.location.href="html/dt/praesentation.php";
        }else{
           document.location.href="html/it/praesentation.php";
        }
    }else{
        if (navigator.userLanguage.indexOf("de") > -1) {
             document.location.href="html/dt/praesentation.php";
        }else{
            document.location.href="html/it/praesentation.php";
        }    }
}