var http_request = false;
var clicks	  = 0;
function makePOSTRequest(url, parameters) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		 http_request = new XMLHttpRequest();
		 if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
				//http_request.overrideMimeType('text/xml');
				http_request.overrideMimeType('text/html');
		 }
	} else if (window.ActiveXObject) { // IE
		 try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
		 } catch (e) {
				try {
					 http_request = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
		 }
	}
	if (!http_request) {
		 alert('Cannot create XMLHTTP instance');
		 return false;
	}
	
	http_request.onreadystatechange = alertContents;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function alertContents() {
	if (http_request.readyState == 4) {
		 if (http_request.status == 200) {
				//alert(http_request.responseText);
				result = http_request.responseText;
				document.getElementById('myspan').innerHTML = result;            
		 } else {
				alert('Hubo un problema en la Solicitud.');
		 }
	}
}

function get(obj) {
	var poststr = "Nombre=" + encodeURI( document.getElementById("Nombre").value ) +
	"&Correo=" + encodeURI( document.getElementById("Correo").value ) +
	"&Telefono=" + encodeURI( document.getElementById("Telefono").value ) +
	"&Comentarios=" + encodeURI( document.getElementById("Comentarios").value )+
	"&capt=" + encodeURI( document.getElementById("capt").value )+			  
	"&Submit=" + encodeURI( document.getElementById("Submit").value )+
	"&Pagina=" + encodeURI( document.getElementById("Pagina").value );
	makePOSTRequest('http://www.vivatoursperu.com/captcha/c-envio-chico.php', poststr);
}

function write_captcha(){
	define('Nombre', 'string', 'Nombre');
	define('Correo', 'email', 'E-mail');
	clicks++;
	document.getElementById('capt').value		= ''
	document.getElementById('captcha_id').innerHTML = '<img src="http://www.vivatoursperu.com/captcha/captcha_img.php?clicks=' + clicks + '" border="0" alt="" /><a href="#" onclick="write_captcha();"><img src="http://www.vivatoursperu.com/captcha/png_bank/refresh.png" border="0" alt="" /></a><br /><span style="font-weight: normal; color:#FF6600">Escribe los caracteres de la imagen</span>';
	return false;
}