function createRequestObject() {

       var req;

       if(window.XMLHttpRequest){
          // Firefox, Safari, Opera...
          req = new XMLHttpRequest();
       } else if(window.ActiveXObject) {
          // Internet Explorer 5+
          req = new ActiveXObject("Microsoft.XMLHTTP");
       } else {
          // There is an error creating the object,
          // just as an old browser is being used.
          alert('Problem creating the XMLHttpRequest object');
       }

       return req;

    }

    // Make the XMLHttpRequest object
    var http = createRequestObject();

    function sendRequest(q) {

       // Open PHP script for requests
       http.open('get', 'check-exercise.php?q='+q);
       http.onreadystatechange = handleResponse;
       http.send(null);

    }

    function handleResponse() {

       if(http.readyState == 4 && http.status == 200){

          // Text returned FROM the PHP script
          var response = http.responseText;

          if(response) {
             // UPDATE ajaxTest content
             document.getElementById("searchResults").innerHTML = response;
          }

       }

    }



function ajaxFunction(){
	var ajaxRequest = false;

	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser does not support this script.");
				return false;
			}
		}
	}


	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4 && ajaxRequest.status == 200){
			var ajaxDisplay = document.getElementById('ajaxDiv');
			ajaxDisplay.innerHTML = ajaxRequest.responseText;
		}
	}
	var exercise = document.getElementById('exercise').value;
	var METs = document.getElementById('METs').value;
	var calex = document.getElementById('calex').value;
	var weighte = document.getElementById('weighte').value;
	var queryString = "?exercise=" + exercise + "&METs=" + METs + "&calex=" + calex + "&weighte=" + weighte;
	ajaxRequest.open("GET", "how-much-exercise-calculator.php" + queryString, true);
	ajaxRequest.send(null);
}