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' class='window-mask' style='display:none'></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");         } }