function verify() {
var themessage = "You are required to complete the following fields: ";
if (document.form.name.value=="") {
themessage = themessage + " - NAME";
}
if (document.form.email.value=="") {
themessage = themessage + " -  EMAIL";
}

if (themessage == "You are required to complete the following fields: ") {
document.form.submit();
}
else {
alert(themessage);
return false;
   }
}