function hello(){
var uri = Components.classes["@mozilla.org/network/standard-url;1"]
.createInstance(Components.interfaces.nsIURI);
uri.spec = "http://www.google.com/";var ios = Components.classes["@mozilla.org/network/io-service;1"]
.getService( Components.interfaces.nsIIOService );
var channel = ios.newChannelFromURI(uri);var input = Components.classes["@mozilla.org/scriptableinputstream;1"]
.createInstance(Components.interfaces.nsIScriptableInputStream);input.init(channel.open());
alert(input.read(5000));
}