<style> #colorbox, #cboxOverlay, #cboxWrapper{position:absolute; top:0; left:0; z-index:9999; overflow:hidden;} #cboxOverlay{position:fixed; width:100%; height:100%;} #cboxMiddleLeft, #cboxBottomLeft{clear:left;} #cboxContent{position:relative;} #cboxLoadedContent{overflow:auto;} #cboxTitle{margin:0;} #cboxLoadingOverlay, #cboxLoadingGraphic{position:absolute; top:0; left:0; width:100%;} #cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{cursor:pointer;} .cboxPhoto{float:left; margin:auto; border:0; display:block;} .cboxIframe{width:100%; height:100%; display:block; border:0;} #cboxOverlay{background:#000;opacity:0.5 !important;} #colorbox{ box-shadow:0 0 15px rgba(0,0,0,0.4); -moz-box-shadow:0 0 15px rgba(0,0,0,0.4); -webkit-box-shadow:0 0 15px rgba(0,0,0,0.4); } #cboxTopLeft{width:14px; height:14px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) no-repeat 0 0;} #cboxTopCenter{height:14px; background:url(https://lh4.googleusercontent.com/--SeTA6D94zU/T42VTrX4TxI/AAAAAAAAD_c/AKhTRygNB7k/s75/border.png) repeat-x top left;} #cboxTopRight{width:14px; height:14px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) no-repeat -36px 0;} #cboxBottomLeft{width:14px; height:43px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) no-repeat 0 -32px;} #cboxBottomCenter{height:43px; background:url(https://lh4.googleusercontent.com/--SeTA6D94zU/T42VTrX4TxI/AAAAAAAAD_c/AKhTRygNB7k/s75/border.png) repeat-x bottom left;} #cboxBottomRight{width:14px; height:43px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) no-repeat -36px -32px;} #cboxMiddleLeft{width:14px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) repeat-y -175px 0;} #cboxMiddleRight{width:14px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) repeat-y -211px 0;} #cboxContent{background:#fff; overflow:visible;} #cboxLoadedContent{margin-bottom:5px;} #cboxLoadingOverlay{background:url(https://lh6.googleusercontent.com/-E9dVofW8BBY/T42WBJ5M22I/AAAAAAAAD_w/w7AL0l9gVKk/s40/loading-background.png) no-repeat center center;} #cboxLoadingGraphic{background:url(https://lh5.googleusercontent.com/-ibVOtcbbUyU/T42WNcii6_I/AAAAAAAAEAE/Mrplo9QsPks/s32/loading.gif) no-repeat center center;} #cboxTitle{position:absolute; bottom:-25px; left:0; text-align:center; width:100%; font-weight:bold; color:#7C7C7C;} #cboxCurrent{position:absolute; bottom:-25px; left:58px; font-weight:bold; color:#7C7C7C;} #cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{position:absolute; bottom:-29px; background:url(https://lh3.googleusercontent.com/-E2COAfbIz9I/T42VA9FunjI/AAAAAAAAD_M/NKJf8y74BKs/s225/controls.png) no-repeat 0px 0px; width:23px; height:23px; text-indent:-9999px;} #cboxPrevious{left:0px; background-position: -51px -25px;} #cboxPrevious.hover{background-position:-51px 0px;} #cboxNext{left:27px; background-position:-75px -25px;} #cboxNext.hover{background-position:-75px 0px;} #cboxClose{right:0; background-position:-100px -25px;} #cboxClose.hover{background-position:-100px 0px;} .cboxSlideshow_on #cboxSlideshow{background-position:-125px 0px; right:27px;} .cboxSlideshow_on #cboxSlideshow.hover{background-position:-150px 0px;} .cboxSlideshow_off #cboxSlideshow{background-position:-150px -25px; right:27px;} .cboxSlideshow_off #cboxSlideshow.hover{background-position:-125px 0px;} #subscribe { font: 12px/1.2 Arial,Helvetica,san-serif; color:#666; } #subscribe a, #subscribe a:hover, #subscribe a:visited { text-decoration:none; } .box-title { color: #3B5998; font-size: 20px !important; font-weight: bold; margin: 10px 0; border:1px solid #ddd; -moz-border-radius:6px; -webkit-border-radius:6px; border-radius:6px; box-shadow: 5px 5px 5px #CCCCCC; padding:10px; line-height:25px; font-family:arial !important; } .box-tagline { color: #999; margin: 0; text-align: center; } #subs-container { padding: 35px 0 30px 0; position: relative; } a:link, a:visited { border:none; } .demo { display:none; } </style> <script src='http://yourjavascript.com/1029251148/jquery.min.js'></script> <script src="http://yourjavascript.com/1141272178/jquery.colorbox-min.js"></script> <script type="text/javascript"> jQuery(document).ready(function(){ if (document.cookie.indexOf('visited=true') == -1) { var fifteenDays = 1000*60*60*24*30; var expires = new Date((new Date()).valueOf() + fifteenDays); document.cookie = "visited=true;expires=" + expires.toUTCString(); $.colorbox({width:"350px", inline:true, href:"#subscribe"}); } }); </script> <!-- This contains the hidden content for inline calls --> <div style='display:none'> <div id='subscribe' style='padding:10px; background:#fff;'> <center> <iframe src="http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2FPremiumDesign3D&width=300&colorscheme=light&show_faces=true&border_color=%23ffffff&stream=false&header=false&height=258" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:300px; height:258px;" allowtransparency="true"></iframe> </center> </div> </div>

Aperte Ctrl + F e procure por PremiumDesign3D Substitua-o pelo endereço de sua página do Facebook, por exemplo é:
http://facebook.com/PremiumDesign3D

Exatamente o final que é o nome da sua página do Facebook, que irá substituir por PremiumDesign3D
Feito isto, é só salvar.

Lembrando que a tela só aparecerá uma vez no navegador até que você limpe o cache.

Dúvidas? Perguntas? Comente para que eu possa esclarecer tua dúvida!