Ajax Call

function ajaxGetRate(node)

{

// 1. initialize XMLHttp object

if ( window.XMLHttpRequest )  // Mozilla browser

{

httpRequest = new XMLHttpRequest();

}

else if ( window.ActiveXObject)  // IE browser

{

httpRequest = new ActiveXObject("Microsoft.XMLHTTP");

}

// 2. specify the response processing function

// onreadystatechange:  

httpRequest.onreadystatechange = processRequest;

// 3. send http request

httpRequest.open('GET', 'http://localhost/start', true);

httpRequest.send(null);

}

function processRequest()

{

// readyState: 

// 0: request not initialized 

// 1: server connection established

// 2: request received 

// 3: processing request 

// 4: request finished and response is ready

if ( httpRequest.readyState == 4 )

{

if ( httpRequest.status == 200 )

{

document.getElementById("msg").innerHTML = request.responseText;

}

}

}