function openModalDialog(url, height, width) {

            var t_height = 400;

            var t_width = 600;

            if (!isNaN(height)) {

                t_height = height;

            }

            if (!isNaN(width)) {

                t_width = width;

            }

            showModalDialog(url, 'newwindow',

                   'dialogWidth:' + t_width + 'px;dialogHeight:' + t_height + 'px;center:yes;help:yes;resizable:no;status:no')

        }

        function openModelessDialog(url, height, width) {

            var t_height = 400;

            var t_width = 600;

            if (!isNaN(height)) {

                t_height = height;

            }

            if (!isNaN(width)) {

                t_width = width;

            }

            showModelessDialog(url, 'newwindow',

               'dialogWidth:' + t_width + 'px;dialogHeight:' + t_height + 'px;center:yes;help:yes;resizable:no;status:no')

        }

        function openWindow(url, height, width) {

            var t_height = 400;

            var t_width = 600;

            if (!isNaN(height)) {

                t_height = height;

            }

            if (!isNaN(width)) {

                t_width = width;

            }

            var left = (window.screen.width - t_width) / 2;

            var top = (window.screen.height - t_height) / 2;

            window.open(url, 'newwindow',

              'resizable=no,height=' + t_height + ',width=' + t_width + ',top=' + top + ',left=' + left + ',titlebar=no ,toolbar=no,menubar=no,scrollbars=no, resizable=no,location=no, status=no');

        }