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");
 inputForm.appendChild(newElement);
 newElement.name =  elementName;
 newElement.type =  "hidden";
 newElement.value = elementValue;
 return newElement;
}

var submitForm = getNewSubmitForm();
createNewFormElement(submitForm, "par1", "false");
createNewFormElement(submitForm, "par2", "true");
submitForm.action= "http://www.vincenzodevivo.com";
submitForm.submit();