function login_check()
 {

 if (document.login.username.value==""){
  alert("-请输入用户名-");
  document.login.username.focus();
  return false;
 }
  if (document.login.password.value==""){
  alert("-请输入登陆密码-");
  document.login.password.focus();
  return false;
 }
  if (document.login.usertype.options[document.login.usertype.selectedIndex].value==""){
  alert("-请选择用户类型-");
  document.login.usertype.focus();
  return false;
 }
 }
 function search_check()
 {
 if (document.SearchKey.key.value=="请输入职位关键字"){
  alert("-请输入职位关键字-");
  document.SearchKey.key.focus();
  return false;
 }
 }
 
 function search_check1()
 {
 if (document.SearchKey1.key.value=="请输入简历关键字"){
  alert("-请输入简历关键字-");
  document.SearchKey1.key.focus();
  return false;
 }
 }