解决Chrome浏览器中使用showModalDialog返回值为undefined

主页面：

    <script type="text/javascript">

        function SelectGroupCust() {

            var temp = window.showModalDialog("Default2.aspx?xx=" + Date(), "", "dialogWidth=800px;dialogHeight=600px;help=no;center=yes;");

            //for chrome

            if (temp == undefined) {

                temp = window.returnValue;

            }

            alert(temp);

            return true;

        }

    </script>

详细页面：

    <script language="javascript" type="text/javascript">

        function ReturnAddressee() {

            if (window.opener != undefined) {

                window.opener.returnValue = "1";

            }

            else {

                window.returnValue = "2";

            }

            window.close();

        }

    </script>