function ajaxObject() {
	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;
			}
		}
	}
	return ajaxRequest;
}

function readBanners(str) {
	ajaxRequest = ajaxObject();
	
	ajaxRequest.onreadystatechange = function() {
		if (ajaxRequest.readyState == 4) {
			var ajaxDisplay = document.getElementById('banner');
			var ajaxFetch = ajaxRequest.responseText;
			ajaxDisplay.innerHTML = ajaxFetch;
		}
	}
	ajaxRequest.open("GET", "banners.php", true);
	ajaxRequest.send(null); 
}