var hw_ajax;
function hw_createRequestObject() {
//    var browser = navigator.appName;
//    if(browser == "Microsoft Internet Explorer"){
//        ro = new ActiveXObject("Microsoft.XMLHTTP");
//    }else{
//        ro = new XMLHttpRequest();
//    }
	
      if (window.XMLHttpRequest) 
	  {
		  hw_ajax = new XMLHttpRequest();
	  }
      else if (window.ActiveXObject)
	  {
		  hw_ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
	  }
}

hw_createRequestObject();


function hw_requestTest()
{
	//alert(wgScriptPath);
	hw_ajax.open('get', wgScriptPath+'/hallowelt/lib/hw_ajax.php?ajax_test');
    hw_ajax.onreadystatechange = function() 
	{
    	//alert('irgendwas');
	
		if(hw_ajax.readyState == 4)
		{
        	var response = hw_ajax.responseText;
//			window.status = response;
		}	
	}
	hw_ajax.send(null);
}	

function hw_requestWithAnswer(url)
{
    hw_ajax.open('get', url);
    hw_ajax.onreadystatechange = function() 
	{
	    if(hw_ajax.readyState == 4)
		{
        	var response = hw_ajax.responseText;
			hw_message(response+'<br/><input type="button" value="OK" onclick="toggleMessage();"');
		}	
	}
	hw_ajax.send(null);
}	

// return value must consist of two parts divided by a semicolon: a) 'yes' or 'no' for reload, b) the message
function hw_requestWithAnswerAndReload(url)
{
    hw_ajax.open('get', url);
    hw_ajax.onreadystatechange = function() 
	{
	    if(hw_ajax.readyState == 4)
		{
        	var response = hw_ajax.responseText;
			var values = new Array();
			if(response.indexOf('@;@') != -1) 
			{
            	values = response.split('@;@');
			}
			else
			{
				values[0] = 'no';
				values[1] = response;
			}
				hw_message_text = '';
				if (values[0]=='yes') hw_message_text = '<br/><input type="button" value="OK" onclick="window.location.reload( false );">';
				else hw_message_text = '<br/><input type="button" value="OK" onclick="toggleMessage();"';
				if (values[1]) hw_message(values[1]+hw_message_text);
			
		}	
	}
	hw_ajax.send(null);
}	


function hw_message (text)
{
	hw_alert(text);	
}

function hw_update_select_csv (sel_id, opts)
{
	opts = opts.split(';');
	hw_update_select(sel_id, opts);
}

function hw_update_select(sel_id, opts)
{
	sel = document.getElementById(sel_id);
	if (sel.options.length > 0)
		for (i=sel.options.length; i>=0; i--) sel.remove(i);
	for (i=0; i<opts.length-1; i++)
	{
		opt = document.createElement("OPTION");
		if (opts[i].indexOf('@@') != -1)
		{
			t = opts[i].split('@@');
			opt.value=t[0];
			opt.text=t[1];			
		}
		else
		{
			opt.value=opts[i];
			opt.text=opts[i];
		}
		try { sel.add(opt, null); }
		catch(e) { sel.add(opt); } // IE
	}	
}

function hw_load_js(url)
{
	hw_ajax.open('get', url, false);
	hw_ajax.send(null);
	var response = hw_ajax.responseText;
	eval(response);	
}

function hw_load_css(url)
{
	 // IE
  	if(document.createStyleSheet) document.createStyleSheet(url);
    // Mozilla, Netscape, Opera
  	else
	{
    	var objStyle = document.createElement("style");
    	var objText = document.createTextNode("@import url("+url+") screen;");
    	objStyle.appendChild(objText);
    	document.getElementsByTagName("head")[0].appendChild(objStyle);
  	}
}