MxWeiXinPF.Web/weixin/ggk/js/watermark.js

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/*
 * jQuery Watermark plugin
 * Version 1.3 (24-FEB-2012)
 * @requires jQuery v1.3 or later
 *
 * Examples at: http://mario.ec/static/jq-watermark/
 * Copyright (c) 2010 Mario Estrada
 * Licensed under the MIT license:
 * http://www.opensource.org/licenses/mit-license.php
 *
 */

(function ($) {
    var old_ie = $.browser.msie && $.browser.version < 8;
    var hard_left = 4;
    $.watermarker = function () { };
    $.extend($.watermarker, {
        defaults: {
            color: '#999',
            left: 0,
            top: 0,
            fallback: false,
            animDuration: 300,
            minOpacity: 0.6
        },
        setDefaults: function (settings) {
            $.extend($.watermarker.defaults, settings);
        },
        checkVal: function (val, label, event_blur) {
            if (val.length == 0) $(label).show();
            else $(label).hide();

            return val.length > 0;
        },
        html5_support: function () {
            var i = document.createElement('input');
            return 'placeholder' in i;
        }
    });

    $.fn.watermark = function (text, options) {
        var options, elems;
        options = $.extend($.watermarker.defaults, options);
        elems = this.filter('textarea, input:not(:checkbox,:radio,:file,:submit,:reset)');

        if (options.fallback && $.watermarker.html5_support()) return this;

        elems.each(function () {
            var $elem, attr_name, label_text, watermark_container, watermark_label;
            var e_margin_left, e_margin_top, pos, e_top = 0,
                height, line_height;

            $elem = $(this);
            if ($elem.attr('data-jq-watermark') == 'processed') return;

            attr_name = $elem.attr('placeholder') != undefined && $elem.attr('placeholder') != '' ? 'placeholder' : 'title';
            label_text = text === undefined || text === '' ? $(this).attr(attr_name) : text;
            watermark_container = $('<span class="watermark_container"></span>');
            watermark_label = $('<span class="watermark">' + label_text + '</span>');