function buchpruefer()
{
var ausdruck = /^[\w-\.]+@[\w-\.]+\.[a-zA-Z]{2,4}$/;
var email = document.buch.email.value;
var text = document.buch.text.value;

if (text=="" || email=="")
    {
    alert("Bitte beide Felder 'Email' UND 'Text' unbedingt ausfüllen!");
    return false;
    }

if (ausdruck.test(email)==false || email.length<7)
    {
    alert("Bitte gültige Email-Adresse eingeben!");
    return false;
    }
}



function ZeichenUebrig(target)
{
var maxLength = 700;
if (target.value.length > maxLength)
        {
        target.value = target.value.substring(0,maxLength);
        var uebrig = 0;
        }
else
        {
        uebrig = maxLength - target.value.length;
        }
document.postad.laenge.value = uebrig;
}

function checkemail(mail)
{

}