function load(url, callback) {

  var xhr;
		
  if(typeof XMLHttpRequest !== 'undefined') { xhr = new XMLHttpRequest(); }
  else {

    var versions = ["Microsoft.XmlHttp", 
		    "MSXML2.XmlHttp",
		    "MSXML2.XmlHttp.3.0", 
		    "MSXML2.XmlHttp.4.0",
		    "MSXML2.XmlHttp.5.0"];
			 
    for(var i = 0, len = versions.length; i < len; i++) {
	
      try {

        xhr = new ActiveXObject(versions[i]);
	break;
			 
      } catch(e) {}

    }
	
  }
		
  xhr.onreadystatechange = ensureReadiness;
		
  function ensureReadiness() {
			
    if(xhr.readyState < 4) {
				
      return;
			
    }
			
    if(xhr.status !== 200) {
				
      return;
	
    }

    if(xhr.readyState === 4) {
	    
      callback(xhr);

    }			
		
  }
		
  xhr.open('GET', url, true);
  xhr.send('');
	
  }
  
  function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}
  
  function tweet(id) {
	  
	  if(readCookie('mnm_user')) {
	
		  load("../oauth/tweet.php?id=" + id, function(xhr) {

	if(xhr.responseText) { alert(xhr.responseText); };
      
  });
  
	  }
	
  }