FacesContext redirect with POST parameters - jsf

Question

I need to redirect page into external site with POST parameters, but I cannot use vanilla HTML <form action="url"> like it is explained here:
JSF commandButton - passing POST params to an external site
because then the form would be within a jsf form - and it doesn't work.
Is it possible to use:
FacesContext.getCurrentInstance().getExternalContext().redirect("http://example.com");
with POST parameters without additional vanilla form somehow? Or maybe there is other way to acheive this without form?

Answer 1

Try something like this:
JAVASCRIPT:
function redirect() {
document.getElementById("mySubmitButton").submit();
}
XHTML:
<h:form>
<span onclick="javascript:redirect()" class="linkClass">REDIRECT</span>
</h:form>
<div style="display:none:"> <!-- If you want it hidden -->
<form action="http://external/myplace.html" method="post">
<input type="hidden" value="value1"></input>
<input type="submit" id="mySubmitButton"</input>
</form>
</div>
EDIT: Added another test.
PASSING DYNAMIC PARAMETER:
In this example we assume that we are always going to send a value.
JAVASCRIPT:
function redirect(dynamicValue) {
document.getElementById("dynamicField").value = dynamicValue;
document.getElementById("mySubmitButton").submit();
}
XHTML:
<h:form>
<span onclick="javascript:redirect('myValue')" class="linkClass">REDIRECT</span>
</h:form>
<div style="display:none:"> <!-- If you want it hidden -->
<form action="http://external/myplace.html" method="post">
<input id="dynamicField" type="hidden" value=""></input>
<input type="hidden" value="value1"></input>
<input type="submit" id="mySubmitButton"</input>
</form>
</div>