Popup geeft waarde niet door

<script type="text/javascript" src="functions/jscripts/tiny_mce/tiny_mce.js"></script>
//de rest van tiny mce

<script type="text/javascript"> 
function test() { 
  window.open('pop.html','','toolbar=0,scrollbars=1,resizable=0');  
} 
</script> 

<form name="form" method="post" action=""> 
  <textarea name="tekst"></textarea>
  <input type="button" value="klik" onclick="test()" /> 
</form> 

<script type="text/javascript" src="functions/jscripts/tiny_mce/tiny_mce.js"></script>
//de rest van tiny mce
 
<script type="text/javascript"> 
function test() { 
  window.open('pop.html','','toolbar=0,scrollbars=1,resizable=0');  
} 
</script> 
 
<form name="form" method="post" action=""> 
  <textarea name="tekst"></textarea>
  <input type="button" value="klik" onclick="test()" /> 
</form>

<script type="text/javascript"> 
function test() { 
  window.opener.document.forms['form'].elements['tekst'].value  = 'blaat'; 
} 
</script> 

<form name="form1" method="post" action="dummy.html"> 
  <textarea name="textfield">test tekst</textarea> 
  <input type="button" value="klik" onclick="test()" /> 
</form>

<script type="text/javascript"> 
function test() { 
  window.opener.document.forms['form'].elements['tekst'].value  = 'blaat'; 
} 
</script> 
 
<form name="form1" method="post" action="dummy.html"> 
  <textarea name="textfield">test tekst</textarea> 
  <input type="button" value="klik" onclick="test()" /> 
</form>