function checkenquiryFields() { 

if (document.INFOFORM.firstname.value == "") { 
alert("Details incorrect. Please enter your First Name."); 
document.INFOFORM.firstname.focus(); return;

}

 var str = document.INFOFORM.firstname.value
 var slen = str.length
 
 for (i=0; i < slen; i++) {
    var ch = str.substring(i,i+1)
    if ( (ch < "a" || "z" < ch) && (ch < "A" || "Z" < ch) && ch != " ") {
     alert("Details incorrect. " + (i+1)  + "th Character in the FIRST NAME field is Invalid!")
     document.INFOFORM.firstname.value.focus()
     return;
     }
  }

if (document.INFOFORM.email.value.indexOf("@")<3){ // checks for at least 3 characters before the @

alert("The email entered appears to be incorrect - please check the username and format of the email that it contains '@' ");
document.INFOFORM.email.focus(); return;

}

if (document.INFOFORM.found.value == "null") { 
alert("Details incorrect. Please enter how you found our website."); 
document.INFOFORM.found.focus(); return;

}

else {  // if none of the fields have any errors then submit the form

document.INFOFORM.submit(); // In this document,  submit the form called notify

}


}