You can use the Microsoft XML object for this.
code:
var xml = new ActiveXObject('Microsoft.XMLDOM'); //Create the ActiveX object
xml.load("http://whatpulse.org/api/users/171247.xml"); //Load the XML file
var totalKeyCount = xml.selectNodes("/UserStats/TotalKeyCount/text()"); //Get the text from the node
var message = "I have made "+totalKeyCount+" key strokes."; //Create a message
ChatWnd.SendMessage(message); //Send the message --- Make sure ChatWnd is defined!!!
Normally, it should work perfectly.