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"); } }