document.write("<div id='ajaxDiv'><img src = \"images/loading.gif\"></div>");

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
		}
	}
}
	// Create a function that will receive data sent from the server
ajaxRequest.onreadystatechange = function(){
	if(ajaxRequest.readyState == 4){
		var ajaxDisplay = document.getElementById('ajaxDiv');
			ajaxDisplay.innerHTML = ajaxRequest.responseText;
	}
}
	
var queryString = "?comic=" + comic + "&start=" + start + "&user=" + user;
ajaxRequest.open("GET", "showcomments.php" + queryString, true);
ajaxRequest.send(null);