var xmlHttp;
var form;
function GetXmlHttpObject()
{ var xmlHttp=null;
  try {xmlHttp=new XMLHttpRequest();}
  catch (e)
  {try {xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");}
   catch (e) {xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
  }
  return xmlHttp;
}

function show_filter(frm)
{ var selected_offers='';
  form=frm;
  for(var i=0;i<frm.filter.length;i++)
  { if(frm.filter[i].checked==true){ selected_offers=selected_offers+frm.filter[i].value+'|';}}

  if(selected_offers.length>0)
  { document.getElementById('merchant_ar').style.display = "none";
    document.getElementById('merchant_text').style.display = "none";
    document.getElementById('merchant_text_alt').style.display = "";
    document.getElementById('title_ar').style.display = "none";
    document.getElementById('title_text').style.display = "none";
    document.getElementById('title_text_alt').style.display = "";
    document.getElementById('price_ar').style.display = "none";
    document.getElementById('price_text').style.display = "none";
    document.getElementById('price_text_alt').style.display = "";
    document.getElementById('deal_ar').style.display = "none";
    document.getElementById('deal_text').style.display = "none";
    document.getElementById('deal_text_alt').style.display = "";
  }
  else
  { document.getElementById('merchant_ar').style.display = "";
    document.getElementById('merchant_text').style.display = "";
    document.getElementById('merchant_text_alt').style.display = "none";
    document.getElementById('title_ar').style.display = "";
    document.getElementById('title_text').style.display = "";
    document.getElementById('title_text_alt').style.display = "none";
    document.getElementById('price_ar').style.display = "";
    document.getElementById('price_text').style.display = "";
    document.getElementById('price_text_alt').style.display = "none";
    document.getElementById('deal_ar').style.display = "";
    document.getElementById('deal_text').style.display = "";
    document.getElementById('deal_text_alt').style.display = "none";
  }
  
  xmlHttp=GetXmlHttpObject();
  if (xmlHttp==null){alert("Your browser does not support AJAX!"); return;}
  var url="/dealsearch/filter.php";
  url=url+"?comment="+selected_offers; 
  url=url+"&deal_id="+frm.deal_id.value; 
  url=url+"&limit="+frm.limit_start.value; 
  url=url+"&sid="+Math.random();
  xmlHttp.onreadystatechange=stateChanged_filter;
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);
}

function deselectAllFilter(frm)
{ if(frm==null)
  if(form!=null)
   frm=form;
  for(var i=0;i<frm.filter.length;i++) frm.filter[i].checked=false;
  show_filter(frm);
}

function stateChanged_filter()
{ if (xmlHttp.readyState==4){document.getElementById("result_div").innerHTML=xmlHttp.responseText;}}