var flag
flag=0

function change(obj) {
  if (flag==0)
    flag=1
  else
    flag=0;

  obj.focus();
}


function convert(myfield,e) {
  if (flag==0) {
    var key;
    if (window.event)
      key = window.event.keyCode;
    else if (e)
      key = e.which;
  
    if (key>31)
      if (key<128) {
        if (window.event)
          window.event.keyCode=' !"#$%،گ)(×+و-./0123456789:ك,=.؟@ِذ}ىُىلآ÷ـ،/’د×؛َءٍف‘{ًْإ~جژچ^_پشذزيثبلاهتنمئدخحضقسفعرصطغظ<|>ّ'.charCodeAt(key-32);
        else if (e)
          e.which=' !"#$%،گ)(×+و-./0123456789:ك,=.؟@ِذ}ىُىلآ÷ـ،/’د×؛َءٍف‘{ًْإ~جژچ^_پشذزيثبلاهتنمئدخحضقسفعرصطغظ<|>ّ'.charCodeAt(key-32);
      }

    return true;
  }
}