js去除左右空格

    function yanzheng(val) {
        return val.replace(/(^\s*)|(\s*$)/g, "");
    }

 

function Inputchecking() {
        var account = document.getElementById("txt_ACCOUNT");

  if (yanzheng(account.value) == "") {
            alert(‘请输入账号‘);
            account.focus();
            return false;

}else{

    return true;

}