function show1() {
    document.getElementById("leftMiddle1").style.display = "block";
    document.getElementById("leftMiddle2").style.display = "block";
    document.getElementById("leftMiddle1x").style.display = "none";
    document.getElementById("leftMiddle2x").style.display = "none";
}
function show2() {
    document.getElementById("leftMiddle1").style.display = "none";
    document.getElementById("leftMiddle2").style.display = "none";
    document.getElementById("leftMiddle1x").style.display = "block";
    document.getElementById("leftMiddle2x").style.display = "block";
}

function focusLogin() {
    exit();
    var userName = document.getElementById(txtUserNameLeft);
    alert("请先登录！");
    userName.focus();
}
function checkLogin() {
    var userName = document.getElementById(txtUserNameLeft);
    var pwd = document.getElementById(txtPwdLeft);
    var re = /select|update|delete|exec|count|’|"|=|;|>|<|%/i;
    if (userName.value.replace(/\s/g, "") == "") {
        userName.value = "";
        alert("请输入帐号！");
        userName.focus();
        return false;
    }
    else if (re.test(userName.value)) {
        alert('您输入的内容中含有非法字符！');
        userName.value = "";
        userName.focus();
        return false;
    }
    else if (pwd.value.replace(/\s/g, "") == "") {
        pwd.value = "";
        alert("请输入密码！");
        pwd.focus();
        return false;
    }
    else if (re.test(pwd.value)) {
        alert('您输入的内容中含有非法字符！');
        pwd.value = "";
        pwd.focus();
        return false;
    }
    else {
    
        return true;
    }
}
function show() {
    document.getElementById("leftTop11x").style.display = "none";
    document.getElementById("leftTop12x").style.display = "block";
}
function exit() {
    document.getElementById("leftTop11x").style.display = "block";
    document.getElementById("leftTop12x").style.display = "none";
}