A mask effect example code for js forming page

        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");
                ({
                    width:     () + "px",
                    height:     () + "px",
                    filter: "alpha(opacity=60)"
                }).show();
                    ("", function(){
                    ({
                        width:     () + "px",
                        height:     () + "px"
                    });
                });
            }
            maskStackCount++;
        }
        else if(method == "close"){
            maskStackCount--;
            $("#window-mask").remove();
                ("");
        }
}