<?
function trim(pstr) {
 var search = 0
 while (pstr.charAt(search) == " ") {
  search = search + 1
 }
 pstr = pstr.substring(search, (pstr.length))
 search = pstr.length - 1
 while (pstr.charAt(search) ==" ")
 {
  search = search - 1
 }
 return pstr.substring(0, search + 1)        
}

function submit_form() {
 if((!document.login.user_id.value) || (!trim(document.login.user_id.value))){
  alert('ID를 입력해주세요.');
  document.login.user_id.focus();
  return false;
 }

 if((!document.login.user_pw.value) || (!trim(document.login.user_pw.value))){
  alert('패스워드를 입력해주세요.');
  document.login.user_pw.focus();
  return false;
 }
 return true;
}
?>