var http_request = false;


function getBook(){
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			document.getElementById("Book").innerHTML = http_request.responseText;
		} else {
			alert('There was a problem with the request (' + http_request.status + ').');
		}
	}
}


function Ajax(url, metoda, funkcija, formData){
	
	http_request = false;
	
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html');
			// See note below about this line
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			alert("Msxml2.XMLHTTP"+e.description);
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {"Microsoft.XMLHTTP"+errLog(e.description);}
		}
	}
	
	if (!http_request) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = eval(funkcija);
	if(metoda!=""){
		http_request.open('POST', url, true);
		http_request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		http_request.send(formData);
	}else{
		http_request.open('GET', url, true);
		http_request.send(null);
	}
}