function init_post_request() {

  this.fn_request = false;

  if (window.XMLHttpRequest) { // Mozilla, Safari,...
    this.fn_request = new XMLHttpRequest();
    if (this.fn_request.overrideMimeType) {
      this.fn_request.overrideMimeType('text/html');
    }
  } 
	else if (window.ActiveXObject) { // IE
    try {
      this.fn_request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
       try {
         this.fn_request = new ActiveXObject("Microsoft.XMLHTTP");
       } catch (e) {}
    }
  }
  if (!this.fn_request) {
    alert('Cannot create XMLHTTP instance');
    return false;
  }

}

function post_request(obj, url, parameters) {

  obj.open('POST', url, true);
  obj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  obj.setRequestHeader("Content-length", parameters.length);
  obj.setRequestHeader("Connection", "close");
  obj.send(parameters);

}

function build_query(frm) {
  var str = "";
  var element, i = 0;
  while ((element = document.getElementById(frm).elements[i++]) != null) {
      var qc = toQueryComponent(element);
      if (qc != "") str += "&" + qc;
  }
  return str.substring(1);
}

function toQueryComponent(input) {
    if (!input.name || input.disabled)
        return "";

    var n = urlencode(input.name);

    switch (input.type) {
    case "text":
    case "password":
    case "submit":
    case "hidden":
        return n + "=" + urlencode(input.value);
    case "textarea":
        // normalize line breaks as CR LF pairs as per RFC 1866
        var v = input.value.split(/\r\n|\r|\n/).join("\r\n");
        return n + "=" + urlencode(v);
    case "checkbox":
    case "radio":
        if (!input.checked)
            return "";
        //var v = getRealValue(input);
				var v = input.value;
        if (v === null) v = "on";
        return n + "=" + urlencode(v);
    case "select-one":
    case "select-multiple":
        var nvp = [];
        var opt, i = 0;
        while ((opt = input.options[i++]) != null) {
            if (opt.selected) {
                var v = getRealValue(opt);
                if (v === null) v = opt.text;
                // older versions of IE do not support Array.push
                nvp[nvp.length] = n + "=" + urlencode(v);
            }
        }
        return nvp.join("&");
    default:
        // input types reset, button, image, and file not implemented
        return "";
    }
}

function urlencode(str) {
    var v;
    try { v = encodeURIComponent(str); } catch (e) { v = escape(str); }
    return v.replace(/%20/g,"+");
}

function getRealValue(input) {
    var attr = input.getAttributeNode("value");
    return (attr && attr.specified) ? input.getAttribute("value") : null;
}

function launch_js(data) {
  // RegExp from prototype.sonio.net
  
  data = data.replace("<!--", "");
  data = data.replace("-->", "");
  
  var ScriptFragment = '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)';
           
  var match    = new RegExp(ScriptFragment, 'img');
  var scripts  = data.match(match);
		
    if(scripts) {
        var js = '';
        for(var s = 0; s < scripts.length; s++) {
            var match = new RegExp(ScriptFragment, 'im');
            js += scripts[s].match(match)[1];
        }
        eval(js);
    }
}
function GetXmlHttpObject(handler)
{
    var objXmlHttp=null
 
    if (navigator.userAgent.indexOf("Opera")>=0)
    {
        alert("Opera not supported...")
        return;
    }
    if (navigator.userAgent.indexOf("MSIE")>=0)
    {
        var strName="Msxml2.XMLHTTP"
        if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
        {
            strName="Microsoft.XMLHTTP"
        }
        try
        {
            objXmlHttp=new ActiveXObject(strName)
            objXmlHttp.onreadystatechange=handler
            return objXmlHttp
        }
        catch(e)
        {
            alert("Error. Scripting for ActiveX might be disabled")
            return
        }
    }
    if (navigator.userAgent.indexOf("Mozilla")>=0)
    {
        objXmlHttp=new XMLHttpRequest()
        objXmlHttp.onload=handler
        objXmlHttp.onerror=handler
        return objXmlHttp
    }
} 

function getmenu(str, display_id)
{
  
	if(str!=""){
    var url=rootpath + "menus.php" + "?doc_id=" + str
    xmlHttp=GetXmlHttpObject(stateChanged(display_id))
		
    xmlHttp.open("GET", url , true)
    xmlHttp.send(null)		
	}	
}
function stateChanged(display_id)
{
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    {  			
			document.getElementById(display_id).innerHTML=xmlHttp.responseText
    }
}
var sc_request;
var active_sc_info = "";

function add_to_cart(pro_id, qty) {

  error_msg = "";
	
	if (active_sc_info != "") {
	  document.getElementById(active_sc_info).style.display = "none";
	}
	
	active_sc_info = "scinfo" + pro_id;
	
  var url   = "ajax/shopping_cart.ajx.php";
  var query = "cmd=add_to_cart&pro_id=" + pro_id + "&qty=" + qty;
  
  tmp_http_req   = new init_post_request();
  sc_request     = tmp_http_req.fn_request;
  
  sc_request.onreadystatechange = update_sc_info;
  
  post_request(sc_request, url, query);
	
	return(false);

}
function update_sc_info() {

  if (sc_request.readyState == 4 || sc_request.readyState == "complete") {	 
    data = sc_request.responseText;
		document.getElementById('sc_num_items').innerHTML = data;
		
		var so = new SWFObject("flash/sc.swf", "pop_up", 400, 150, "6", "#FFFFFF");
    so.addParam("wmode", "transparent");
    so.write(active_sc_info);
		
		document.getElementById('side_sc_info').style.display = "block";
  	document.getElementById(active_sc_info).style.display = "block";
	}	

}

function close_pop_up() {
  document.getElementById(active_sc_info).style.display = "none";
}