function getRootPath() {
    var strFullPath = window.document.location.href;
    var strPath = window.document.location.pathname;
    var pos = strFullPath.indexOf(strPath);
    var prePath = strFullPath.substring(0, pos);
    var postPath = strPath.substring(0, strPath.substr(1).indexOf('/') + 1);
    return (prePath + postPath);
}
function RndNum(n) {
    var rand = "";
    for (var i = 0; i < n; i++)
        rand += Math.floor(Math.random() * 10);
    return rand;
}
function changCode(url) {
    var rand = new Date().getTime();
    var str = url + 'data/include/imagecode.htmp?act=verifycode&random=' + rand + RndNum(4);
    $("#checkCodeImg").attr("src", str);
}
$(".msgbtn").click(function() {
    var name = $("#name");
    var contact = $("#contact");
    var content = $("#content");
    var checkcode = $("#checkcode");
    switch (true) {
        case name.val() == '':
            alert("姓名不能空！");
            $("#name").focus();
            return false;
            break;
        case contact.val() == '':
            alert("电话不能空！");
            $("#contact").focus();
            return false;
            break;
        case content.val() == '':
            alert("对不起，您还没有留言呢！");
            $("#content").focus();
            return false;
            break;
        case checkcode.val() == '':
            alert("验证码不能为空！");
            $("#checkcode").focus();
            return false;
            break;
    }
    //电话号码验证
    var pattern = new RegExp(/^[0-9-+]+$/);
    if (!pattern.test($("#contact").val())) {
        alert('您输入有效电话号码！');
        $("#contact").focus();
        return false;
    }
    var email = $("#email").val();
    if (email != '') {
        if (!email.match(/^[A-Za-z\d]+([-_.][A-Za-z\d]+)*@([A-Za-z\d]+[-.])+[A-Za-z\d]{2,4}$/)) {
            alert("邮箱格式错误，请重新输入");
            $("#email").focus();
            return false;
        }
    }
    if ($("#checkcode").val().length != 4) {
        alert("验证码必须是4位");
        return false;
    }
});
//输入框获得焦点的时候，提示内容消失
$(".m_label").click(function() {
    $(this).hide();
    $(this).siblings(".m_input").focus();
});
$(".m_input").focus(function() {
    $(this).siblings(".m_label").hide();
});
$(".m_input").blur(function() {
    if ($(this).val() == '') {
        $(this).siblings(".m_label").show();
    }
});
$(".m_input").each(function() {
    if ($(this).val() != '') {
        $(this).siblings(".m_label").hide();
    }
});