代码如下:

function watermark(settings) {

//默认设置

        var defaultSettings={

watermark_txt:"text",

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:20,//水印行数

            watermark_cols:20,//水印列数

            watermark_x_space:100,//水印x轴间隔

            watermark_y_space:50,//水印y轴间隔

            watermark_color:'#aaa',//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

        };

//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();

//获取页面最大宽度

        var page_width =Math.max(document.body.scrollWidth,document.body.clientWidth);

var cutWidth =page_width*0.0150;

var page_width=page_width-cutWidth;

//获取页面最大高度

        var page_height =Math.max(document.body.scrollHeight,document.body.clientHeight)+450;

// var page_height = document.body.scrollHeight+document.body.scrollTop;

//如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔

        if (defaultSettings.watermark_cols ==0 || (parseInt(defaultSettings.watermark_x +defaultSettings.watermark_width *defaultSettings.watermark_cols +defaultSettings.watermark_x_space * (defaultSettings.watermark_cols -1)) >page_width)) {

defaultSettings.watermark_cols =parseInt((page_width-defaultSettings.watermark_x+defaultSettings.watermark_x_space) / (defaultSettings.watermark_width +defaultSettings.watermark_x_space));

defaultSettings.watermark_x_space =parseInt((page_width -defaultSettings.watermark_x -defaultSettings.watermark_width *defaultSettings.watermark_cols) / (defaultSettings.watermark_cols -1));

}

//如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔

        if (defaultSettings.watermark_rows ==0 || (parseInt(defaultSettings.watermark_y +defaultSettings.watermark_height *defaultSettings.watermark_rows +defaultSettings.watermark_y_space * (defaultSettings.watermark_rows -1)) >page_height)) {

defaultSettings.watermark_rows =parseInt((defaultSettings.watermark_y_space +page_height -defaultSettings.watermark_y) / (defaultSettings.watermark_height +defaultSettings.watermark_y_space));

defaultSettings.watermark_y_space =parseInt(((page_height -defaultSettings.watermark_y) -defaultSettings.watermark_height *defaultSettings.watermark_rows) / (defaultSettings.watermark_rows -1));

}

var x;

var y;

for (var i =0;i

y =defaultSettings.watermark_y + (defaultSettings.watermark_y_space +defaultSettings.watermark_height) *i;

for (var j =0;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));

//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";

                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);

}

}

document.getElementsByClassName('container')[0].appendChild(oTemp);

}

watermark({watermark_txt:'启发风控云'})