find script making http requests from a webpage

Question

I loaded the following website in my browser.

http://enquiry.indianrail.gov.in/ntes/

However, this in turn calls the webpage

http://enquiry.indianrail.gov.in/ntes/IamAlive?t=1400181827732&1n26d5ar7d=1oh5lx7pr3

Just keeping the webpage open and monitoring the network traffic in charles, I see that the webpage makes continuous http requests like

http://enquiry.indianrail.gov.in/ntes/IamAlive?t=1400180955743&12o8i06j23=t8ex3ekbx
http://enquiry.indianrail.gov.in/ntes/IamAlive?t=1400845245363&12o8i0j236=tkl7thfnx

I looked at the html source and couldn't figure out what script in the webpage would be making these http requests. How can I find this?

I wanted to look at the script source so I can find the code and generate the

t=1400180955743
12o8i06j23=t8ex3ekbx

query parameters myself. Any pointers would be appreciated.

Thanks!

Answer 1

in common.js there is the function

function startIamAlive(){
    var timeout=5*60000;
    var fun=function(str){setTimeout(startIamAlive,timeout);};
    $.ajax({url:"IamAlive?t="+new Date().getTime(),success:fun,error:function(s){timeout=60000;fun(s);}});
}

there you can see how it works.