function getObj(id){
	return document.getElementById(id);
}

var xmlhttp;
function loadXMLDoc(url,cfunc){
	if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari
	 	xmlhttp=new XMLHttpRequest();
	} else{// code for IE6, IE5
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	xmlhttp.onreadystatechange=cfunc;
	xmlhttp.open("GET",url,true);
	xmlhttp.send();
}

function sendy(parent,from){

	loadXMLDoc("/inc/subarticles.php?parent="+parent+"&from="+from,function(){
		if (xmlhttp.readyState==4 && xmlhttp.status==200){
	    	document.getElementById("submenu").innerHTML=xmlhttp.responseText;
	    }
	});
}


// tulajdonságok lekérése
// 0->parent, 1->maxArt, 2->from
function get_attr(){
	var attr = new Array();
	attr[0] = parseInt(document.getElementById("meta_parent").value);
	attr[1] = parseInt(document.getElementById("meta_maxArt").value);
	attr[2] = parseInt(document.getElementById("meta_from").value);
return attr;
}

// megjelenő cikkek intervallumának változtatása
function change_interval(from){
	document.getElementById("meta_from").value = from;
}

// gombok elrejtése, mutatása
function button_check(){
	var attr = new Array();
	attr = get_attr();

	if(attr[2]-10 < 0){ getObj("button_prev").style.display = "none"; }
	else{ getObj("button_prev").style.display ="block"; }
	if(attr[2]+10 >= attr[1]){ getObj("button_next").style.display = "none"; }
	else{ getObj("button_next").style.display = "block"; }
}


// következő 10
function next_page(){
	var attr = new Array();
	attr = get_attr();
	from = attr[2]+ 10;
	
	if(from < attr[1]){
		sendy(attr[0],from);
		change_interval(from);
		button_check();
	}

}

//előző 10
function prev_page(){
var attr = new Array();
	attr = get_attr();
	from = attr[2] - 10;
	
	if(from >= 0){	
		sendy(attr[0],from);
		change_interval(from);
		button_check();
	}	
}

// Belépési pont
function init(){
	var attr = new Array();
	attr = get_attr();
	sendy(attr[0],attr[2]);
	button_check();

}