function validateForm(form) { 
if (form.realname.value == "") { 
   alert("Please enter your first and last name "); 
   form.realname.focus( ); 
   return false; 
   }
if (form.company.value == "") { 
   alert("Please enter your company or organization name "); 
   form.company.focus( ); 
   return false; 
   }
if (form.phone.value == "") { 
   alert("Please enter your phone number "); 
   form.phone.focus( ); 
   return false; 
   }
if (form.email.value == "") { 
   alert("Please enter your email address "); 
   form.email.focus( ); 
   return false; 
   }
}