html 动态创建form

<script language="javascript" type="text/javascript">
function newForm(xxx, xxxxx){
var emsform = document.createElement("FORM");
document.body.appendChild(emsform);
emsform.method = "post";
createNewFormElement(emsform, "user", xxx);
createNewFormElement(emsform, "password", xxxxx);
emsform.action = "http://.....";
emsform.target = "";
emsform.submit();
}

function createNewFormElement(inputForm, elementName, elementValue)
{
var newElement = document.createElement("input");
newElement.setAttribute("name",elementName);
newElement.setAttribute("type","hidden");
newElement.setAttribute("value",elementValue);
inputForm.appendChild(newElement);
return newElement;
}
</script>