var http_request = false;
   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('Error al procesar la información');
         }
      }
   }
   
   function get(obj) {
 	  var poststr='';
  	  var id=document.getElementById('id').value;
  	  var nombre=encodeMyHtml(document.getElementById('nombre').value);
  	  var email=document.getElementById('email').value;
  	  var comentario=encodeMyHtml(document.getElementById('comentario_txt').value);
      poststr = "id=" + encodeURI(document.getElementById("id").value ) +
	  				"&nombre=" + encodeURIComponent(nombre) +
					"&email=" + encodeURIComponent(email) +
                    "&comentario=" + encodeURIComponent( comentario );
      makePOSTRequest('/comentario_save.asp', poststr);
	  document.getElementById("comentario_form").style.visibility="hidden";
  document.getElementById("comentario_form").style.display = "none";
   }
   

//***************************************
//Funciones comunes a todos los problemas
//***************************************

function encodeMyHtml(text) {
	text = text.replace(/[á]/g,'á'); 
	text = text.replace(/[é]/g,'é'); 
	text = text.replace(/[í]/g,'í'); 
	text = text.replace(/[ó]/g,'ó'); 
	text = text.replace(/[ú]/g,'ú'); 
	text = special(text);
return text;
}

function special(source)
{
	var result = '';
	for (var i = 0; i < source.length; i++)
	{
		var c = source.charAt(i);
		if (c > '~')
		{
			c = '&#' + c.charCodeAt() + ';';
		}
		result += c;
	}
	return result;
}