function validate() {
 ck=false;
 if (document.enquiry.name.value=="") {
  alert("You have not entered your name.")
  document.enquiry.name.focus()
  ck=true;
 }
 if (!ck) {
 if (document.enquiry.email.value.indexOf("@") == -1 || document.enquiry.email.value.indexOf(".") == -1 || document.enquiry.email.value.indexOf(" ") != -1) {
  alert("Sorry, \""+document.enquiry.email.value+"\" is an invalid e-mail address.")
  document.enquiry.email.focus()
  ck=true;
 }
 }
 if (!ck) {
 if (document.enquiry.comments.value=="") {
  alert("You have not entered any comments.")
  document.enquiry.comments.focus()
  ck=true;
 }
 }
 if (!ck) {document.enquiry.submit; return true;}
 if (ck) {return false;}
 }