function checkAJAX() {
	var http_request = false;
	var can_http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html');
		}
		can_http_request = true;
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
			can_http_request = true;
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
				can_http_request = true;
			} catch (e) { can_http_request = false; }
		}
	}

// test kein ajax
//	var can_http_request = false;
	return can_http_request;
}

function POSTdata(fobj, post_str, destobj, url_, callbackfunc) {
	if (typeof(ajax_url)!='undefined') {
		url = ajax_url;
	} else if (typeof(url)=="undefined") {
		url = "/verwaltung/operator.php";
	}
	
	if(url_!=''){
		url = url_;	
	}
	
	var http_request = false;
	//http_request_destobj = destobj;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	} else {
	
		if (fobj!=null)
			post_str += '&' + getFormValues(fobj);

		http_request.onreadystatechange = function () {
			try {
				if (http_request.readyState == 2) {
					destobj.innerHTML = 'loading ...';
				} else if (http_request.readyState == 4) {
					if (http_request.status == 200) {
						// alert(http_request.responseText);
						result = http_request.responseText;
						
						if (destobj.tagName == 'TEXTAREA' || destobj.tagName == 'INPUT')
							destobj.value = result;
						else
							destobj.innerHTML = result;
						
						if (typeof(callbackfunc)!="undefined") {
							callbackfunc(result);
						}	
						execJS(destobj); 
					} else {
						alert('There was a problem with the request.');
					}
				}
			} catch (e) {}
		}
	
		http_request.open('POST', url, true);
		http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8"); // 
		http_request.setRequestHeader("Content-length", post_str.length);
		http_request.setRequestHeader("Connection", "close");
		http_request.send(post_str);
	}
}

function getFormValues(fobj) {
	var ret_str = "";
	
	for(var i = 0;i < fobj.elements.length;i++) {
		if (fobj.elements[i].name!='')
		switch(fobj.elements[i].type) {
			case "text":
				ret_str += fobj.elements[i].name + "=" + (fobj.elements[i].value) + "&";
				break;
			case "textarea":
				ret_str += fobj.elements[i].name + "=" + (fobj.elements[i].value) + "&";
				break;
			case "hidden":
				ret_str += fobj.elements[i].name + "=" + (fobj.elements[i].value) + "&";
				break;
			case "radio":
				radios = document.getElementsByName(fobj.elements[i].name);
				for (var i_r=0;i_r<radios.length;i_r++) {
					if (radios[i_r].checked) {
						ret_str += fobj.elements[i].name + "=" + (radios[i_r].value) + "&";
						break;
					}
				}
			break;
			case "checkbox":
				if (fobj.elements[i].checked) {
					ret_str += fobj.elements[i].name + "=" + (fobj.elements[i].value) + "&";
				} else {
					ret_str += fobj.elements[i].name +"=0&";
				}
				break;
			case "select-one":
				ret_str += fobj.elements[i].name + "=" + fobj.elements[i].options[fobj.elements[i].selectedIndex].value + "&";
				break;
		}
	}
	ret_str = ret_str.substr(0,(ret_str.length - 1));
	return ret_str;
}

function post_from_fck() {
	for ( var name in FCKeditorAPI.__Instances ) {
		document.getElementById(name).value = escape(FCKeditorAPI.GetInstance(name).GetHTML());
	}
}

var bSaf = (navigator.userAgent.indexOf('Safari') != -1);
var bOpera = (navigator.userAgent.indexOf('Opera') != -1);
var bMoz = (navigator.appName == 'Netscape');
function execJS(node) {
  var st = node.getElementsByTagName('SCRIPT');
  var strExec;
  for(var i=0;i<st.length; i++) {     
    if (bSaf) {
      strExec = st[i].innerHTML;
    }
    else if (bOpera) {
      strExec = st[i].text;
    }
    else if (bMoz) {
      strExec = st[i].textContent;
    }
    else {
      strExec = st[i].text;
    }
    try {
		eval(strExec.split("<!--").join("").split("-->").join(""));
    } catch(e) {
      alert(e + "\n" + e.description);
    }
  }
}