function creaAjax(){
	var objetoAjax;
	if(window.XMLHttpRequest){
		objetoAjax = new XMLHttpRequest(); // Creacion del objeto en buenos navegadores
	}else{
		try{
			objetoAjax = new ActiveXObject("Microsoft.XMLHTTP"); // Creacion del objeto en Internet Explorer
		}catch(e){
			alert('Browser does not support ajax'); // No se puede crear el objeto ajax
		}
	}return objetoAjax;
}

function validar_recaptcha(code){
	
	variables="code="+code;
	var ajax = creaAjax();
	ajax.open("POST", "securimage/validar.php",true);
	ajax.onreadystatechange = function() {
		if (ajax.readyState == 4){
			dev=ajax.responseText;
			if(dev=="MAL"){
				alert("The text you entered don't match with the graphic");
				document.form1.code.focus();
				return;
			}else{
				document.form1.action="submitComment.php";
				document.form1.submit();
			}		
		}else{
			// validando...
		}
	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send(variables);
	
}