function createRequestObject(){
var ro;
var browser = navigator.appName;
if(browser == "Microsoft Internet Explorer"){
ro = new ActiveXObject("Microsoft.XMLHTTP");
}else{
ro = new XMLHttpRequest();
}
return ro;
}
var http = createRequestObject();
// ----------------------------------------------
function sent(table_id,row_id){
	var f = document.comment_form;
	var name = f.name.value;
	var email = f.email.value;
	var comment = f.comment.value;
	if(name == '') {
		alert("please input your name!");
	}else if (email == '')
	{	alert("please input your email!");
	}else if (comment == '')
	{	alert("please input your comment!")
	}else if (table_id == '')
	{	alert(" the table_id is null! ");
	}else if (row_id == '')
	{	alert(" the row_id is null! ");
	} else{
	http.open('get','articles/ajax_comment.php?name='+name+'&email='+email+'&comment='+comment+'&table_id='+table_id+'&row_id='+row_id,true);
		http.onreadystatechange = handleResponse;
		http.send(null);
	}
}
// ----------------------------------------------
function handleResponse() {
	
	if(http.readyState == 4){
		if (http.status == 200){
			comment_form('post_form','success_html');
			//var response = http.responseText;
			/*if(response.indexOf('|||' != -1)) {
				updates = response.split('|||');
				document.getElementById(updates[0]).innerHTML = updates[1];
			}*/
		}else {
			alert("the page error!!!");
		}
	}
}
function post() {  
	reset();
	if(post_form.style.display=='none'){  
		post_form.style.display='block';
	}else{  
		post_form.style.display='none';
		}
  }
function reset(){
	document.comment_form.name.value = '';
	document.comment_form.email.value = '';
	document.comment_form.comment.value = '';
 }
function comment_form(id,action){
	document.getElementById(id).innerHTML = content[action];
}