Create a pop on standard page by clicking a button

Add the below .zip file in Static Resources

Create a Custom button with On Click Java script functionality.

{!REQUIRESCRIPT('/soap/ajax/26.0/connection.js')} 
{!REQUIRESCRIPT('/js/functions.js')} 
{!REQUIRESCRIPT('/resource/jQueryForPopup/jQuery/jquery-1.8.2.min.js')} 
{!REQUIRESCRIPT('/resource/jQueryForPopup/jQuery/ui/jquery-ui-1.9.1.custom.min.js')} 
{!REQUIRESCRIPT('/resource/jQueryForPopup/jQuery/postmessage/jquery.ba-postmessage.js')} 
{!REQUIRESCRIPT('/resource/jQueryForPopup/jQuery/bbq/jquery.ba-bbq.min.js')} 
requireCssFile('/resource/jQueryForPopup/jQuery/ui/css/ui-lightness/jquery-ui-1.9.1.custom.min.css'); 
function requireCssFile(filename) 
{ 
var fileref = document.createElement('link');
fileref.setAttribute('rel', 'stylesheet');
fileref.setAttribute('type', 'text/css');
fileref.setAttribute('href', filename);
document.getElementsByTagName('head')[0].appendChild(fileref);
} 
var j$ = jQuery.noConflict();
var iframe_url = '{!URLFOR("/apex/Sample")}';
var child_domain = iframe_url.substring(0, iframe_url.indexOf('/', 9));
var parent_domain = window.location.protocol + '//' + window.location.host;
var j$modalDialog = j$('<div id="opppopup"></div>')
.html('<iframe id="iframeContentId" src="' + iframe_url + '" frameborder="0" height="100%" width="100%" marginheight="0" marginwidth="0" scrolling="no" />') 
.dialog({ 
autoOpen: false, 
title: 'Sample Popup', 
resizable: true, 
width: 800, 
height: 540, 
autoResize: true, 
modal: true, 
draggable: true 
});

j$modalDialog.dialog('open');