ajax readystate为1,Ajax readyState总是等于1

您好我正在使用提交给C ++ cgi程序的ajax。我遇到的问题是readyState总是1.我不知道我做错了什么。

var asyncRequest; // XMLHttpRequest object

try

{

asyncRequest = new XMLHttpRequest();

// Register event handler

asyncRequest.onreadystatechange = StateChange;

// Prepare to post data to URL asynchronously

asyncRequest.open("POST", "save_vote.cgi", true);

//Data to be sent to cgi program

postData="star=1&movie=test";

// Set the appropriate HTTP request headers

asyncRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

asyncRequest.setRequestHeader("Content-length", postData.length);

// Make request

asyncRequest.send(postData);

}

catch (exception)

{

alert("Request failed: " + exception.message);

}

}

function StateChange()

{

// Make sure request has completed with 200 OK status

//alert(asyncRequest.status)

if (asyncRequest.readyState == 4 && asyncRequest.status == 200)

{

alert("Hello");

}

}

这是cgi程序

#include "cgi.h"

#include

int main()

{

cout << "Content-type: text/html\n\n";

ParseInputParameters();

ofstream fout;

if (fout.fail())

{

cout << "CGI Error - Couldn't open file for appending for appending.";

return 0;

}

//message to be sent back in the response text

cout << "OK";

fout.close();

return 0;

}