/**
* Various Ajax utilities.
*/
/**
* return and XMLHttpRequest object, or null if not supported.
*/
function getAjaxRequestor() {
var request;
if(window.XMLHttpRequest) {
//Mozilla-based browsers
request = new XMLHttpRequest();
} else if(window.ActiveXObject) {
// IE stuff
request=new ActiveXObject("Msxml2.XMLHTTP");
if(!request) {
request=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return request;
}
/**
* Prepare a request. This always uses GET and makes asynch requests
* Params. All you need to do is to call 'send()' on the request:
* request: the HttpRequest to use (onreadystatechange must be set before this call)
* url: the URL to query
* args: as dict of key/value pairs representing optional args
* handler: the response handler
*/
function makeAjaxRequest(request, url, args, handler) {
if(args) {
url += "?";
for(var k in args)
url += k + "=" + encodeURIComponent(args[k]) + "&";
}
var argSep =
url += ((url.indexOf('?') >= 0) ? "&" : "?") + "rndAjaxArg=" + Math.random();
request.onreadystatechange = handler;
request.open('GET',url,true);
request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
request.send("");
}