var hw_ajax;

// Overwrite Ext's default BLANK_IMAGE_URL. Requires that Ext be loaded beforehand.
Ext.BLANK_IMAGE_URL = wgScriptPath+'hallowelt/js/ext/resources/images/default/s.gif'; 

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_alert(response, 'ok');
		}
	}
	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 res = eval(response);
			if((typeof(res) == 'object' && res[0] == 'SUC')) {
				hw_alert(response, 'reload');
			}
			else {
				hw_alert(response, 'ok');
			}
		}
	}
	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);
  	}
}

function hw_inc_js(filename) {
	var body = document.getElementsByTagName('head').item(0);
	script = document.createElement('script');
	script.src = filename;
	script.type = 'text/javascript';
	body.appendChild(script);
}

function hw_inc_css(filename) {
	var body = document.getElementsByTagName('head').item(0);
	style = document.createElement('link');
	style.rel = 'stylesheet';
	style.type = 'text/css';
	style.href = filename;
	body.appendChild(style);
}

i18n.load("js");