/*
Quelle: http://snippets.dzone.com/posts/show/2025
*/

function $(e){if(typeof e=='string')e=document.getElementById(e);return e}; 
function collect(a,f){var n=[];for(var i=0;i<a.length;i++){var v=f(a[i]);if(v!=null)n.push(v)}return n}; 
ajax={}; 
ajax.x=function(){try{return new ActiveXObject('Msxml2.XMLHTTP')}catch(e){try{return new ActiveXObject('Microsoft.XMLHTTP')}catch(e){return new XMLHttpRequest()}}}; 
ajax.serialize=function(f){var g=function(n){return f.getElementsByTagName(n)};var nv=function(e){if(e.name)return encodeURIComponent(e.name)+'='+encodeURIComponent(e.value);else return ''};var i=collect(g('input'),function(i){if((i.type!='radio'&&i.type!='checkbox')||i.checked)return nv(i)});var s=collect(g('select'),nv);var t=collect(g('textarea'),nv);return i.concat(s).concat(t).join('&');}; 
ajax.send=function(u,f,m,a){var x=ajax.x();x.open(m,u,true);x.onreadystatechange=function(){if(x.readyState==4)f(x.responseText)};if(m=='POST')x.setRequestHeader('Content-type','application/x-www-form-urlencoded');x.send(a)}; 
ajax.get=function(url,func){ajax.send(url,func,'GET')}; 
ajax.gets=function(url){var x=ajax.x();x.open('GET',url,false);x.send(null);return x.responseText}; 
ajax.post=function(url,func,args){ajax.send(url,func,'POST',args)}; 
ajax.update=function(url,elm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.get(url,f)}; 
ajax.submit=function(url,elm,frm){var e=$(elm);var f=function(r){e.innerHTML=r};ajax.post(url,f,ajax.serialize(frm))};
ajax.center=function(elm){document.getElementById(elm).style.left = ( screen.availWidth - 300 ) / 2 +"px";document.getElementById("amazonpopup").style.top = ( screen.availHeight - 100 ) / 2 +"px";}

//Amazon BBcode-Popup
	function show_amazon(asin)
	{
		var content='<img src="./images/loading_blue.gif" alt="" /> Daten werden geladen!';
		close_amazon();
		content = ajax.gets('./amazon_bb.php?ASIN='+asin+'&mode=popup');
		document.getElementById('amazondata').innerHTML = content;
		document.getElementById('amazonpopup').style.display='block';
		ajax.center('amazonpopup');
//debug		alert(content);
	}
	
	function close_amazon()
	{
		document.getElementById('amazonpopup').style.display='none';
		document.getElementById('amazondata').innerHTML = '<img src="./images/loading_blue.gif" alt="" /> Daten werden geladen!';
	}