var hasSubmitted=false;
function submitted()
{
  var submittedBefore=hasSubmitted;
  hasSubmited=true;
  return !submittedBefore;
}
function focus(fld)
{
  if(!focused)
    fld.focus();
  focused=true;
}
function validate(f)
{
  focused=false;
  var msg='';
  var reqFld=new Array(f.name,f.address,f.postcode,f.occupation);
  var reqErr=new Array('Name','Address','Postcode','Occupation');
  for(var i in reqFld)
  {
    if(reqFld[i].value==='')
    {
      msg+='Your '+reqErr[i]+'\n';
      focus(reqFld[i]);
    }
  }
  if(f.homeTelephone.value==='' && f.mobileTelephone.value==='')
  {
    msg+='Your Telephone Number\n';
    focus(f.telephone);
  }
  var testPhone = f.homeTelephone.value.replace(new RegExp("[ \(\)]","g"), "");
  if(f.homeTelephone.value!=='' && testPhone.search('\\d{5}')===-1)
  {
    msg+='A Valid Telephone Number\n';
    focus(f.homeTelephone);
  }
	testPhone = f.mobileTelephone.value.replace(new RegExp("[ \(\)]","g"), "");
  if(f.mobileTelephone.value!=='' && testPhone.search('\\d{5}')===-1)
  {
    msg+='A Valid Telephone Number\n';
    focus(f.mobileTelephone);
  }
  if(!(f.newspaper.checked
    ||f.flyer.checked
    ||f.friend.checked
    ||f.carSign.checked
    ||f.shopWindow.checked
    ||f.businessCard.checked
    ||f.roadSign.checked
    ||f.pleaseSpecify.value!=''))
  {
    msg+='How you found out about this site';
    focus(f.pleaseSpecify);
  }
  if(msg!=='')
  {
    alert('Please enter the following details:\n\n'+msg+'\n\nFree information will only be sent to serious applicants who send their full details.\n\nPlease note - incomplete or inaccurate forms will not be taken seriously.\n\nBe assured you will not be entered onto any mailing list.');
    return false;
  }
  return submitted();
}