var xmlHttp;
function createXMLHttpRequest() {
    if (window.ActiveXObject) {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    } 
    else if (window.XMLHttpRequest) {
        xmlHttp = new XMLHttpRequest();
    }
}

function list_namesub(id) {
    var obj = document.getElementById("sub_id");
	var obj_default = '- Choose -';
	if(id ==""){
	while(obj.childNodes.length>0){obj.removeChild(obj.childNodes[0]);}
	obj[0] = new Option(obj_default,'');}else{
    var url = "get_sub.php?id=" + id;
    createXMLHttpRequest();
    xmlHttp.onreadystatechange = handleStateChange;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
	function handleStateChange() {
    if(xmlHttp.readyState == 4) {
        if(xmlHttp.status == 200) {
			var results = xmlHttp.responseText;
			while(obj.childNodes.length>0){obj.removeChild(obj.childNodes[0]);}
			arr_list=results.split("/");
			if(arr_list.length-1!=0){
			for (var i=0; i < eval(arr_list.length-1); i++) {
				shop_arr=arr_list[i].split(",");
				obj.options[i] = new Option(shop_arr[0],shop_arr[1]); 
			}}else{
			while(obj.childNodes.length>0){obj.removeChild(obj.childNodes[0]);}
			obj[0] = new Option(obj_default,'');
			}
        }
    }}
}}