用这锻代码 之前请先下载jquery库

复制代码 代码如下:

var maskStackCount = 0;

function mask(method){

//这里是你想要进行遮罩的窗口，我这里想要遮罩的是一个iframe窗口，也可以用var winObj=$(window)

var winObj=window.top.$("body").find("iframe[name='dialognormaliframe']");

if(typeof method == "undefined"){

method="open";

}

if (method == "open") {

if (maskStackCount <= 0) {

var mask = $("<div id='window-mask'></div>").appendTo("body");

mask.css({

width: winObj.width() + "px",

height: winObj.height() + "px",

filter: "alpha(opacity=60)"

}).show();

winObj.on("resize.mask", function(){

mask.css({

width: winObj.width() + "px",

height: winObj.height() + "px"

});

});

}

maskStackCount++;

}

else if(method == "close"){

maskStackCount--;

$("#window-mask").remove();

winObj.off("resize.mask");

}

}