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In fact, just about any tag that references an external URL can be used. For
example, inline frames, as defined by the
Now find this tag using a DOM call and set its src value to the server-side program
that should be invoked along with a query string containing the data to be transmitted.
var ifr = document.getElementById("hiddenIframe");
ifr.setAttribute("src",url);
It isn??™t necessary to preload the iframe into the page, the DOM can be used to insert it
dynamically. The following rewrite of the sendRequest function replicates the previous
image-based communication rating example but uses DOM inserted inline frames instead:
function sendRequest(url,payload)
{
var ifr = document.createElement("iframe");
ifr.style.visibility="hidden";
document.body.appendChild(ifr);
ifr.src = url+"?"+payload; // set src last to avoid double fetch
}
When you run the example (http://ajaxref.com/ch2/onewayiframeget.html), notice that
your browser will likely show an indication of network activity, which may not be desirable.


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