Question

The servlet queries the database and throws data in to a file.
This data file has to be refreshed every 10 seconds for users to view the updated information.

I need help with triggering servlet with javascript function. I am successful in getting the timeinterval method in JS but I am having issue calling the servlet.

var int=self.setInterval("trigger()",10000); 

function(){ 

    //Servlet queries the db and loads the data into the file. 
    trigger servlet ...??? 

    " TriggerServlet? ...... 

}

Answer 1

      var url = "servlet URL"; 
      var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
      request.open("GET",url,true);
      request.send(null);
      request.onreadystatechange = function() {
            if (request.readyState == 4) {
                if (request.status == 200) {
                    var response = request.responseText;
                    alert(response);
                }
        }
      };