var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i

function checkmail(e){
var returnval=emailfilter.test(e.value) 
return returnval
}
     
function email_doOnsubmit(theForm) {
if (theForm.vorname && theForm.vorname.value == "" ) {
alert("Please enter your first name!");
return false;
}
if (theForm.name && theForm.name.value == "" ) {
alert("Please enter your last name!");
return false;
}
if (theForm.email && theForm.email.value == "" ) {
alert("Please enter an e-mail address!");
return false;
}
if ( theForm.kommentar && theForm.kommentar.value == "" ) {
alert("Please enter a comment/message!");
return false;
}
if (checkmail(theForm.email) == false) {
alert("Please enter a valid email address.")
return false;
}
theForm.referrer.value = document.location.href;
return true;
}


function logon_doOnSubmit(theForm) {
if (theForm.user && theForm.user.value == "" ) {
alert("Please enter your email address!");
return false;
}
if (theForm.password && theForm.password.value == "" ) {
alert("Please enter your password!");
return false;
}
return true;
}