javascript代码求助

Simon.hu

需求场景--需要页面打上用户水印
问题--加上下面这段代码后页面撑开了，变得很多空白区，无法调整

求解--希望这个代码能自适应页面大小

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: 10, //水印行数
watermark_cols: 10, //水印列数
watermark_x_space: 70, //水印x轴间隔
watermark_y_space: 30, //水印y轴间隔
watermark_color: "#aaa", //水印字体颜色
watermark_alpha: 0.2, //水印透明度
watermark_fontsize: "15px", //水印字体大小
watermark_font: "微软雅黑", //水印字体
watermark_width: 210, //水印宽度
watermark_height: 80, //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
  );

  //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 = "9999";
   mask_div.style.pointerEvents = "none"; //pointer-events:none  让水印不遮挡页面的点击事件 //兼容IE9以下的透明度设置
   //mask_div.style.border="solid #eee 1px";
   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);
}
var today = new Date();
watermark({
  watermarl_element: "pagesContainer",    //水印元素的id
  watermark_txt: Forguncy.Page.getUserName()+today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate()+' '+today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds(), //水印内容
});