var ajaxElementId = "ajaxContent";

function ajaxClearContent() {
	var e = document.getElementById(ajaxElementId); 
	e.innerHTML = "";
}

function whenLoading(){
	var e = document.getElementById(ajaxElementId); 
	e.innerHTML = "<div>loading...<"+"/div>";
}

function whenLoaded(){
	var e = document.getElementById(ajaxElementId); 
	e.innerHTML = "<div>loading...<"+"/div>";
}

function whenInteractive(){
	var e = document.getElementById(ajaxElementId); 
	e.innerHTML = "<div>loading...<"+"/div>";
}

function whenCompleted(){
}

function changeImageMagsBooks(id, cat){
	var ajax = new sack();
	ajaxElementId = "ajaxContent";

	ajax.setVar("id", id);
	ajax.setVar("cat", cat);
	ajax.requestFile = "ajaxMagsBooks.php";
	ajax.method = "POST";
	ajax.element = ajaxElementId;
	ajax.onLoading = whenLoading;
	ajax.onLoaded = whenLoaded; 
	ajax.onInteractive = whenInteractive;
	ajax.onCompletion = whenCompleted;
	ajax.runAJAX();
}