var mikExp = /[$\\@\\\#%\^\&\*\>\<\;\:\'\"\(\)\[\]\+\_\{\}\`\~\=\|]/;
function dodacheck(val) {
  var strPass = val.value;
  var strLength = strPass.length;
  var lchar = val.value.charAt((strLength) - 1);
  if(lchar.search(mikExp) != -1) {
    var tst = val.value.substring(0, (strLength) - 1);
    val.value = tst;
  }
}