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) {
	if (typeof(ajax_url)!='undefined') {
		url = ajax_url;
	} else if (typeof(url)=="undefined") {
		url = "/verwaltung/operator.php";
	}
	
	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 () {
			if (http_request.readyState == 2) {
				destobj.innerHTML = 'Ihre Daten werden verarbeitet ...';
			} 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;
					
					execJS(destobj);            
				} else {
					alert('There was a problem with the request.');
				}
			}
		}
	
		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 + "=" + urlencode(fobj.elements[i].value) + "&";
				break;
			case "textarea":
				ret_str += fobj.elements[i].name + "=" + urlencode(fobj.elements[i].value) + "&";
				break;
			case "hidden":
				ret_str += fobj.elements[i].name + "=" + urlencode(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 + "=" + urlencode(radios[i_r].value) + "&";
						break;
					}
				}
			break;
			case "checkbox":
				if (fobj.elements[i].checked) {
					ret_str += fobj.elements[i].name + "=" + urlencode(fobj.elements[i].value) + "&";
				} else {
					ret_str += fobj.elements[i].name +"=0&";
				}
				break;
			case "select-one":
				ret_str += fobj.elements[i].name + "=" + urlencode(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);
    }
  }
}

function urlencode( str ) {
	// URL-encodes string  
	// 
	// version: 901.1411
	// discuss at: http://phpjs.org/functions/urlencode

	// +   original by: Philip Peterson
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +      input by: AJ
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +   improved by: Brett Zamir
	// %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
	// *     example 1: urlencode('Kevin van Zonneveld!');
	// *     returns 1: 'Kevin+van+Zonneveld%21'
	// *     example 2: urlencode('http://kevin.vanzonneveld.net/');
	// *     returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
	// *     example 3: urlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
	// *     returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'
							 
	var histogram = {}, tmp_arr = [];
	var ret = str.toString();
	
	var replacer = function(search, replace, str) {
		var tmp_arr = [];
		tmp_arr = str.split(search);
		return tmp_arr.join(replace);
	};
	
	// The histogram is identical to the one in urldecode.
	histogram["'"]   = '%27';
	histogram['(']   = '%28';
	histogram[')']   = '%29';
	histogram['*']   = '%2A';
	histogram['~']   = '%7E';
	histogram['!']   = '%21';
	histogram['%20'] = '+';
	
	// Begin with encodeURIComponent, which most resembles PHP's encoding functions
	ret = encodeURIComponent(ret);
	
	for (search in histogram) {
		replace = histogram[search];
		ret = replacer(search, replace, ret) // Custom replace. No regexing
	}
	
	// Uppercase for full PHP compatibility
	return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
		return "%"+m2.toUpperCase();
	});
	
	return ret;
}

function urldecode( str ) {
	// Decodes URL-encoded string  
	// 
	// version: 901.1411
	// discuss at: http://phpjs.org/functions/urldecode

	// +   original by: Philip Peterson
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +      input by: AJ
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +   improved by: Brett Zamir
	// %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
	// *     example 1: urldecode('Kevin+van+Zonneveld%21');
	// *     returns 1: 'Kevin van Zonneveld!'
	// *     example 2: urldecode('http%3A%2F%2Fkevin.vanzonneveld.net%2F');
	// *     returns 2: 'http://kevin.vanzonneveld.net/'
	// *     example 3: urldecode('http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a');
	// *     returns 3: 'http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a'
	
	var histogram = {};
	var ret = str.toString();
	
	var replacer = function(search, replace, str) {
		var tmp_arr = [];
		tmp_arr = str.split(search);
		return tmp_arr.join(replace);
	};
	
	// The histogram is identical to the one in urlencode.
	histogram["'"]   = '%27';
	histogram['(']   = '%28';
	histogram[')']   = '%29';
	histogram['*']   = '%2A';
	histogram['~']   = '%7E';
	histogram['!']   = '%21';
	histogram['%20'] = '+';

	for (replace in histogram) {
		search = histogram[replace]; // Switch order when decoding
		ret = replacer(search, replace, ret) // Custom replace. No regexing   
	}
	
	// End with decodeURIComponent, which most resembles PHP's encoding functions
	ret = decodeURIComponent(ret);

	return ret;
}