HTML学习使用js给html页面全屏水印

<!DOCTYPE html>
<html>
<head><meta charset="utf-8"><title>水印</title><style>#water-div{pointer-events:none;position:fixed;top:0;left:0;right:0;bottom:0;}.mask_div{pointer-events:none;}</style>
</head>
<body>
<div style="text-align:center;"><div>页面qipa250效果展现</div><div>页面qipa250水印效果展现</div><div>页面qipa250水印效果展现</div><div>页面水印效果展现</div><div>页面qipa250水印效果展现</div><div>页面水印效果展现</div><div>页面www.qipa250.com水印效果展现</div><div>页面水印效果展现</div><div>页面水印效果展现</div>
</div><div id="water-div"></div>
<script>var txt = "水印内容<br>qipa250";watermark(txt);//监听窗口变动window.onresize = function() {watermark(txt);}function watermark(txt) {//初始设置水印容器高度var water = document.getElementById("water-div");water.innerHTML = "";water.style.height = window.screen.availHeight + "px";water.style.height = document.documentElement.clientHeight + "px";//水印样式默认设置var defaultSettings={watermark_txt:txt,watermark_x:20,//水印起始位置x轴坐标watermark_y:20,//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:70,//水印x轴间隔watermark_y_space:30,//水印y轴间隔watermark_color:'#aaaaaa',//水印字体颜色watermark_alpha:0.4,//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};//获取页面最大宽度var page_width = Math.max(water.scrollWidth,water.clientWidth);//获取页面最大高度var page_height = Math.max(water.scrollHeight,water.clientHeight);// console.log( page_height)//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//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";water.appendChild(mask_div);}}}  
</script>
</body>
</html>