function greet(){
  alert("hello");
}



function getXMLHTTPRequest() {
  var request = false;
  
  try {
    request = new XMLHttpRequest(); /* e.g. Firefox */
  }
   
  catch(err1) {
    try {
      request = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
    } 
    
    catch(err2) {
      try {
        request = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
      } 
      
      catch(err3) {
        request = false;
      } 
    } 
  }
  
  return request;
}

function ajaxFunction(){
	var ajaxRequest;  // The variable that makes Ajax possible!
	
	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 broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
			document.myForm.time.value = ajaxRequest.responseText;
		}
	}
	ajaxRequest.open("GET", "serverTime.php", true);
	ajaxRequest.send(null); 
}