>>871
バカの相手疲れる。

function stringPost(){
var form=document.getElementById(form_id);
var postString=form.text.value;
postString=encodeURIComponent(postString);
var obj=XMLRequest();
obj.onreadystatechange = function(){
if (obj.readyState == 4 && obj.status == 200){
req=obj.responseText;
//hogehoge
}
}
var URL='responseURL';
obj.open("POST",URL,true);
obj.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
obj.send('string='+postString);
}