// JavaScript Document
function createRequestObject() {
  if (window.ActiveXObject) { return new ActiveXObject("Microsoft.XMLHTTP") }
  else if (window.XMLHttpRequest) { return new XMLHttpRequest(); }
  else { alert('Your browser does not support AJAX.'); return null; }
}

function sendRequest(fun) {
  httpObject = createRequestObject();
  if (httpObject != null) {
	httpObject.open("GET", "store_function.php?fun="+fun, true);
	httpObject.send(null);
	httpObject.onreadystatechange = handleResponse;
  }
}
 function handleResponse() {
   if(httpObject.readyState == 4 && httpObject.status == 200){
      // Text returned from PHP script
      var response = httpObject.responseText;
      if(response) {
         // Update ajaxTest content
         document.getElementById("store_func").innerHTML = response;
      }
   }
}