也许你可以用javascript打开一个thickbox。

检查thickbox的高度和宽度的示例。

                    <script type="text/javascript">
                    <!--
                        var viewportwidth,
                            viewportheight;
                        if (typeof window.innerWidth != \'undefined\' ) {
                            viewportwidth = window.innerWidth-80,
                            viewportheight = window.innerHeight-100
                        } else if (typeof document.documentElement != \'undefined\'
                            && typeof document.documentElement.clientWidth !=
                            \'undefined\' && document.documentElement.clientWidth != 0)
                        {
                            viewportwidth = document.documentElement.clientWidth,
                            viewportheight = document.documentElement.clientHeight
                        } else { // older versions of IE
                            viewportwidth = document.getElementsByTagName(\'body\' )[0].clientWidth,
                            viewportheight = document.getElementsByTagName(\'body\' )[0].clientHeight
                        }
                        document.write(\'<a onclick="return false;" href="<?php echo WP_PLUGIN_URL . \'/\' 
                            . FB_WM_BASEDIR; ?>/index.php?KeepThis=true&amp;TB_iframe=true&amp;height=\' 
                            + viewportheight + \'&amp;width=\' + viewportwidth 
                            + \'&amp;modal=false" class="thickbox button"><?php _e( \'Preview\', FB_WM_TEXTDOMAIN ); ?></a>\' );
                        //-->
                    </script>