// JavaScript Document


var isIE = false;
var req;

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function openWindow(URL,winName,features) {
  window.open(URL,winName,features);
}

function initPage() {

	if (document.queryRailwayForm != null) {
		document.queryRailwayForm.railwayCompanyId.options[0].selected = true
		document.queryRailwayForm.routeId.options[0].selected = true
	}

}

function loadXMLDoc(url) {

	if (window.ActiveXObject) {
		isIE = true;
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) {
			req.onreadystatechange = processReqChange;
			req.open("GET", url, true);
			req.send();
		}
	}else if(window.XMLHttpRequest) {
		req = new XMLHttpRequest();
		req.onreadystatechange = processReqChange;
		req.open("GET", url, true);
		req.send(null);
	}
}

function processReqChange() {

	if (req.readyState == 4) {

		if (req.status == 200) {
			clearList();
			buildList();
		}

    }

}

function loadDoc(evt) {
	evt = (evt) ? evt : ((window.event) ? window.event : null);

	if (evt) {
		var elem = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);

		if (elem) {
			var url = "/action/route?areaId=" + elem.form.areaId.value + "&railwayCompanyId=" + elem.options[elem.selectedIndex].value;
			loadXMLDoc(url);
		}

	}

}

function loadRoutes() {
	var url = "/action/route?areaId=" + queryRailwayForm.areaId.value + "&railwayCompanyId=" + queryRailwayForm.railwayCompanyId.value;
	loadXMLDoc(url);
}

function getElementTextNS(prefix, local, parentElem, index) {
	var result = "";

	if (prefix && isIE) {
		result = parentElem.getElementsByTagName(prefix + ":" + local)[index];
    } else {
		result = parentElem.getElementsByTagName(local)[index];
	}
	
	if (result) {

		if (result.childNodes.length > 1) {
			return result.childNodes[1].nodeValue;
		} else {
			return result.firstChild.nodeValue;
		}

	} else {
		return "";
	}

}

function clearList() {
    var select = document.getElementById("routeId");
    while (select.length > 0) {
        select.remove(0);
    }
}

function appendToSelect(select, value, content) {
	var opt;
	opt = document.createElement("option");
	opt.value = value;
	opt.appendChild(content);
	select.appendChild(opt);
}

function buildList() {
	var select = document.getElementById("routeId");
	var items = req.responseXML.getElementsByTagName("route");

	appendToSelect(select, "", document.createTextNode("沿線を選択　　　　"));

	for (var i = 0; i < items.length; i++) {
		appendToSelect(select, getElementTextNS("", "id", items[i], 0),
            document.createTextNode(getElementTextNS("", "routeName", items[i], 0)));
    }

}