<script>
function preview(){
prewin=window.open('about
:Please wait','prewin','width=500,height=440,top=0,left=0, toolbar=no,location=no,directories=no,status=no,me nubar=no,scrollbars=yes,resizable=yes');
prewin.document.write("<title>Preview window</title><body bgcolor=#CAE4FF><br>");
prewin.document.write("<table border=0 width=100% cellspacing=0 cellpadding=8 bgcolor=gray style=\"border: 1 dotted gray;\"><tr><td bgcolor=#FFFFFF width=100%><font face=Verdana size=1>");
// prewin.document.write(document.all.real_email_mess age.value);
prewin.document.write(document.forms[0].real_email_message.value);
prewin.document.write("</td></tr></table>");
}
</script>
<form action="post.php" method="post" ENCTYPE="multipart/form-data">
<input type=button value=" Preview " onclick="javascript
:preview()">
<textarea name=real_email_message cols=86 rows=14 ></textarea>
</form>
Gracias por tu ayuda