Problem with starting script from iframe

Problem with starting script from iframe

Hi! 
Guys, help me please.
There is a page with iframe, into iframe loaded page containing java-script. if I specify the source for the iframe   < iframe name = "iframe1" src = "second.html" >< / iframe >
everything works well, the script works on the parent window and the one in which he is. But if I try load page
into iframe with link  <a href="second.html" target="iframe1"> script don't work for a parent page. Script loses a parent? Please, see this code:

parent.html: 
<html> <head> <title>first</title> <script language="javascript" type="text/javascript" src="jquery.js"></script>  </head>  <body>  <iframe name="iframe1" src="second.html"></iframe>  <a href="second.html" target="iframe1">load page</a>  <p id="abc"> --- </div>  </body> </html>

iframe page second.html: 
<html> <head> <script language="javascript" type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function() {      $("#asd").text("CHILD WORK");          $("#abc",window.top.document).text("PARENT WORK");      alert("WORK OK"); }); </script> </head>  <body>  <div id="asd">-----</div>  </body></html>

How to teach a script to see the main page and make changes to it (parent.html) ?
I will be very grateful for any help, thank you!