Return HTTPs Status Code Of URL

I am trying to write a tool (say [URL])The tool contains a list of https urls (say [URL]) given as a hyperlinks (say abc) on clicking the url the http status code of the https page should be displayed in the same page.. Is this possible? I am currently using the following code snippet..
function sendRequest(url){
var client = new XMLHttpRequest();
client.onreadystatechange = function(){
if (this.readyState == 4)
alert(client.status);
} client.open("GET", url, true);
client.send(null);
}
This seems to be working if the url given is http url but I have to get status for https url for a non-secure (http) url.