function getNewSubmitForm() {
	var submitForm = document.createElement("FORM");
	document.body.appendChild(submitForm);
	submitForm.method = "POST";
	return submitForm;
}

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

function createFormAndSubmit() {
	var submitForm = getNewSubmitForm();
	createNewFormElement(submitForm, "field1", "somevalue");
	submitForm.action = "http://www.facebook.com/";
	submitForm.submit();
}