function check() {
var check=0;

if(document.getElementById('newsletter').fullname.value==""||document.getElementById('newsletter').email.value==""){
    alert ("You must fill out all required fields!");
    return false;
} else {
    c=1;
}

if(document.getElementById('newsletter').company.value==""||document.getElementById('newsletter').address.value==""){
    alert ("You must fill out all required fields!");
    return false;
} else {
    c=1;
}

if(c==1){
    return true;
}
}