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/**
 * 弹出式提示框，默认1.2秒自动消失
 * @param message 提示信息
 * @param style 提示样式，有alert-success、alert-danger、alert-warning、alert-info
 * @param time 消失时间
 */
var prompt = function (message, style, time)
{
    style = (style === undefined) ? 'alert-success' : style;
    time = (time === undefined) ? 1200 : time;
    $('<div>')
        .appendTo('body')
        .addClass('alert ' + style)
        .html(message)
        .show()
        .delay(time)
        .fadeOut();
};

// 成功提示
var success_prompt = function(message, time)
{
    prompt(message, 'alert-success', time);
};

// 失败提示
var fail_prompt = function(message, time)
{
    prompt(message, 'alert-danger', time);
};

// 提醒
var warning_prompt = function(message, time)
{
    prompt(message, 'alert-warning', time);
};

// 信息提示
var info_prompt = function(message, time)
{
    prompt(message, 'alert-info', time);
};

.alert {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 300px;
    max-width: 600px;
    transform: translate(-50%,-50%);
    z-index: 99999;
    text-align: center;
    padding: 15px;
    border-radius: 3px;
}

.alert-success {
    color: #3c763d;
    background-color: #dff0d8;
    border-color: #d6e9c6;
}

.alert-info {
    color: #31708f;
    background-color: #d9edf7;
    border-color: #bce8f1;
}

.alert-warning {
    color: #8a6d3b;
    background-color: #fcf8e3;
    border-color: #faebcc;
}

.alert-danger {
    color: #a94442;
    background-color: #f2dede;
    border-color: #ebccd1;
}