var xmlHttp;
var objHTML;
function GetXmlHttpObject()
{
  var xmlHttp=null;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    }
return xmlHttp;
}
     
function ChangeCont()
{
	
    if(xmlHttp.readyState==4)
        {
			if (xmlHttp.responseText == "0") {
				//alert("0");
        		document.getElementById("message_frame").innerHTML="<br>sorry post message lost,maybe you have not <a href='login.php'>login</a>! ";
			} else if (xmlHttp.responseText == "1") {
				//alert("1");
        		document.getElementById("message_frame").innerHTML="<br>sorry post message lost ,the message is empty";
			} else if (xmlHttp.responseText == "2") {
				//alert("2");
        		document.getElementById("message_frame").innerHTML="<br>sorry post message lost ,please try again later!";
			} else if (xmlHttp.responseText == "3"){
				//alert("3");
        		document.getElementById("message_frame").innerHTML="<br><img src='images/success.gif' />message have been post!";
				setTimeout("window.location.reload()",5000);
			} else {
				//alert("4");
        		document.getElementById("message_frame").innerHTML="";
			}
        }
    }


function On_Post_Message()
{
	//var msg = document.message.mess_content.value;
	//var msg = document.message.mess_content.value.replace( /(^\s*)|(\s*$)/g, '');

	var limitlen = 70; 
	var spv = "\n";
	var temp_mes = document.message.mess_content.value; 
	var temp_mes01 = ""; 
	for (var i=0;i<=temp_mes.length;i++) {
		temp_mes01 += temp_mes.substr(i*limitlen,limitlen)+spv; 
	}
	var msg = temp_mes01.replace( /(^\s*)|(\s*$)/g, '');
	if (msg == "") {
		alert("Please make sure that ur message is not empty!");
		return;
	}
	if (msg.length > 500) {
		alert("Please make sure that ur message not long than 500 letters!");
		return;
	}
	msg = msg.replace(/\n/g,'<br>');
	msg = msg.replace(/'/g,'\'');
	msg = msg.replace(/"/g,'\"');
	var today = new Date();
	document.getElementById("message_frame").innerHTML = "Loading...";
	xmlHttp = GetXmlHttpObject();
	if (xmlHttp==null){objHTML="Your explore doesn't support this site, please use another to retry!";return;}
	var url;
	url="post_message.php";
	url+="?msg="+ msg;
	url+="&sn="+today.getTime();
	
	xmlHttp.onreadystatechange=ChangeCont;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}