function enviaReq(form){
	var oForm = form;
	var sBody = criaReqStr(oForm);
	
	var oXMLHttp = criaXMLHttp();
	oXMLHttp.open("post", oForm.action, true);
	oXMLHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

	oXMLHttp.onreadystatechange = function (){
		if(oXMLHttp.readyState == 4)
			alert(oXMLHttp.responseText);
			oForm.email.value = '';
//		else
			//alert("Ocorreu um erro: " + oXMLHttp.statusText);
	};

	oXMLHttp.send(sBody);
}

function criaReqStr(oForm){
	var aPostStr = new Array();

	for( var i = 0; i < oForm.elements.length; i++ ){
		var sValor = encodeURIComponent(oForm.elements[i].name);
		sValor += "=";
		sValor += encodeURIComponent(oForm.elements[i].value);
		aPostStr.push(sValor);
	}
	return aPostStr.join("&");
}