var req;
var elementId;
var globalIdPack;
function loadXMLDoc(url) {
	req = false;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
}

function processReqChange() {
    // only if req shows "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            // ...processing statements go here...
			idElement=document.getElementById(elementId);
			idElement.innerHTML=req.responseText;
			//idElement.style.display="block";
			if(elementId.substr(0,4) == "size"){
				resetColors(globalIdPack);
			}
			if(elementId=="search_hint"){
				if(req.responseText!=""){
					idElement.style.display="block";
				}else{
					idElement.style.display="none";
				}
			}
        } else {
            alert("There was a problem retrieving the XML data:\n" +
                req.statusText);
        }
    }
}

function selectCity(state){
	D=new Date();
	T=+D;
	idstate=state.options[state.selectedIndex].value;
	url="httprequest_city.php?id_state="+idstate+"&time="+T;
	loadXMLDoc(url);
	if(req){
		resetDistrict();
		req.onreadystatechange = processReqChange;
		elementId='cityD';
		req.open("GET", url, true);
		req.send("");
		
		//globalIdPack=idpack;
	}
}

function selectDistrict(city){
	D=new Date();
	T=+D;
	idcity=city.options[city.selectedIndex].value;
	url="httprequest_district.php?id_city="+idcity+"&time="+T;
	loadXMLDoc(url);
	if(req){
		req.onreadystatechange = processReqChange;
		elementId='dist';
		req.open("GET", url, true);
		req.send("");
		//globalIdPack=idpack;
	}
}

function resetDistrict(){
	option_length=document.searchform.district.options.length;
	for(i=1;i<option_length;i++){
			document.searchform.district.options[1]=null;
	}
}

function liveSearchStart(keywords){
	D=new Date();
	T=+D;
	kw=keywords.value;
	url="httprequest_search.php?kw="+kw+"&time="+T;
	loadXMLDoc(url);
	if(req){
		req.onreadystatechange = processReqChange;
		elementId='search_hint';
		req.open("GET", url, true);
		req.send("");
		
		//globalIdPack=idpack;
	}
}

function hide_div(dv){
	el=document.getElementById(dv);
	el.style.display="none";
}

function showPhone(id_loc, phone){
	el=document.getElementById("tel_"+id_loc);
	el.innerHTML=phone;
}