function select_category(id,cate){

var dellop=document.forms["bbs_form"].elements[cate];
var delmax = dellop.length;
for (i=0;i<delmax;i++) {
dellop.remove(0);
}

if(id != -1){
var htp = createHttpRequest();
htp.open("GET","/bbs/sys/category.php?cate="+id,false);
htp.send(null);
var ttml = htp.responseText;

//start
if(id == 0){
var setop=document.forms["bbs_form"].elements[cate];
var idx=setop.length;
setop.options[idx]=new Option('選択してください', '-1');
}

str = ttml.split("\n");
for (i=0;i<str.length;i++) {
str2 = str[i].split(",");
if(str2[1]){
var setop=document.forms["bbs_form"].elements[cate];
var idx=setop.length;
setop.options[idx]=new Option(str2[1], str2[0]);
}
    }

}}
select_category(0,"cate");

//reed
function createHttpRequest(){
if(window.ActiveXObject) {
try {return new ActiveXObject("Msxml2.XMLHTTP")}
catch(e) {try {return new ActiveXObject("Microsoft.XMLHTTP")}
catch(e2){return null}}
} else if(window.XMLHttpRequest) {return new XMLHttpRequest()
} else {return null}
}