function check_form(form){ 
if (form.name.value == ""){ 
alert("Please insert your first name!"); 
form.name.focus(); 
return (false); 
} 
if (form.surname.value == ""){ 
alert("Please insert your surname!"); 
form.surname.focus(); 
return (false); 
}
if (form.email.value.indexOf('@', 0) == -1){ 
alert("Please insert your eMail!"); 
form.email.focus(); 
return (false); 
}
if (form.enquiry.value == ""){ 
alert("Please insert your enquiry!"); 
form.enquiry.focus(); 
return (false); 
} 
return (true); 
}