jQuery 添加水印

jQuery 添加水印

    <script src="../../../../AJs/jquery.min.js"></script>
    <script type="text/javascript">

        $(document).ready(function () {
            var watermark_txt = "<%=this.CurrenUser.ORGNAME%>";         //水印文字
            watermark({ "watermarl_element": "body_1", "watermark_txt": watermark_txt });       //"body_1"是dom元素上Id属性
        });

        function watermark(settings) {
            //默认设置
            var defaultSettings = {
                watermarl_element: "body",
                watermark_txt: "",
                watermark_x: 10,//水印起始位置x轴坐标
                watermark_y: 10,//水印起始位置Y轴坐标
                watermark_rows: 2000,//水印行数
                watermark_cols: 2000,//水印列数
                watermark_x_space: 50,//水印x轴间隔
                watermark_y_space: 50,//水印y轴间隔
                watermark_color: '#d7d7d7',//水印字体颜色
                watermark_alpha: 0.5,//水印透明度
                watermark_fontsize: '20px',//水印字体大小
                watermark_font: '微软雅黑',//水印字体
                watermark_width: 200,//水印宽度
                watermark_height: 50,//水印长度
                watermark_angle: 15//水印倾斜度数
            };
            //采用配置项替换默认值，作用类似jquery.extend
            if (arguments.length === 1 && typeof arguments[0] === "object") {
                var src = arguments[0] || {};
                for (key in src) {
                    if (src[key] && defaultSettings[key] && src[key] === defaultSettings[key]) {
                        continue;
                    } else if (src[key]) {
                        defaultSettings[key] = src[key];
                    }
                }
            }

            var oTemp = document.createDocumentFragment();

            var maskElement = document.getElementById(defaultSettings.watermarl_element) || document.body;
            //获取页面最大宽度
            var page_width = Math.max(maskElement.scrollWidth, maskElement.clientWidth);
            //获取页面最大高度
            var page_height = Math.max(maskElement.scrollHeight, maskElement.clientHeight, maskElement.scrollTop);
            //水印数量自适应元素区域尺寸
            defaultSettings.watermark_cols = Math.ceil(page_width / (defaultSettings.watermark_x_space + defaultSettings.watermark_width));
            defaultSettings.watermark_rows = Math.ceil(page_height / (defaultSettings.watermark_y_space + defaultSettings.watermark_height));
            var x;
            var y;
            for (var i = 0; i < defaultSettings.watermark_rows; i++) {
                y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
                for (var j = 0; j < defaultSettings.watermark_cols; j++) {
                    x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;
                    var mask_div = document.createElement('div');
                    mask_div.id = 'mask_div' + i + j;
                    mask_div.className = 'mask_div';
                    //mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));
                    mask_div.innerHTML = (defaultSettings.watermark_txt);
                    //设置水印div倾斜显示
                    mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
                    mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
                    mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
                    mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
                    mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
                    mask_div.style.visibility = "";
                    mask_div.style.position = "absolute";
                    mask_div.style.left = x + 'px';
                    mask_div.style.top = y + 'px';
                    mask_div.style.overflow = "hidden";
                    mask_div.style.zIndex = "1029"; // 9999
                    // pointer-events:none  让水印不遮挡页面的点击事件
                    mask_div.style.pointerEvents = 'none';
                    // 设置边框
                    // mask_div.style.border="solid #eee 1px";
                    // 兼容IE9以下的透明度设置
                    mask_div.style.filter = "alpha(opacity=50)";
                    mask_div.style.opacity = defaultSettings.watermark_alpha;
                    mask_div.style.fontSize = defaultSettings.watermark_fontsize;
                    mask_div.style.fontFamily = defaultSettings.watermark_font;
                    mask_div.style.color = defaultSettings.watermark_color;
                    mask_div.style.textAlign = "center";
                    mask_div.style.width = defaultSettings.watermark_width + 'px';
                    mask_div.style.height = defaultSettings.watermark_height + 'px';
                    mask_div.style.display = "block";
                    oTemp.appendChild(mask_div);
                };
            };
            maskElement.appendChild(oTemp);
        }

    </script>