Network Programming in .NET

Here is a simple way to perform basic HTTP Authentication with a XMLHttpRequest – Ajax request – from your webpage.

       var url = 'http://someurl.com';
	xml = new XMLHttpRequest();
	xml.open("GET", url, false, "username", "password");
	xml.onreadystatechange = function() {
	   if (xml.readyState != 4)  { return; }
	   if (xml.status != 200)  {
		 alert("error");
		 return;
	   } 
	   alert(xml.responseText);	   
	 };
	 xml.send(null);

You don’t have to do the Base64 encoding yourself, unlike some examples online. – Do note that “url” needs to be on the same domain as your script.