function yanzheng(val) {
return val.replace(/(^\s*)|(\s*$)/g, "");
}
  return val.replace(/(^\s*)|(\s*$)/g, "");
}
function Inputchecking() {
var account = document.getElementById("txt_ACCOUNT");
 var account = document.getElementById("txt_ACCOUNT");
if (yanzheng(account.value) == "") {
alert('请输入账号');
account.focus();
return false;
 alert('请输入账号');
account.focus();
return false;
}else{
 return true;
 }