function Validate(form){
 if(""==form.name.value){
   alert ("Please enter your name");
   form.name.focus();
   return false;
 } 
 else if(form.email.value=="" && form.phone.value==""){
  alert ("Please enter either your email or your phone number");
  form.email.focus();
  return false;
 }else if(form.email.value!="" && form.email.value.search(/[\-\_0-9a-zA-Z]+\@[\-\_0-9a-zA-Z]+\.[a-zA-Z]+/)==-1){
    alert('Check your e-mail');
    form.email.focus();
    return false;
 }else if(form.comments.value==""){
   alert ("Please enter any comments");
   form.comments.focus();
   return false;
 }else{
 if (form.email.value=="") form.email.value = "anonymous@anonymous.com"
 return true;
 }
return false;
}