Question

I would like to know is it possible to, when clicking a link, open a main page and force to load another page in a frame inside the main page?

Any idea?

Answer 1

Include the following js script on the main page and you are done

function loadframe(){
  var i = document.getElementById("iframeID");
  i.src = "path/to/file";
};

// Check for browser support of event handling capability
if (window.addEventListener)
    window.addEventListener("load", loadIframe, false);
else if (window.attachEvent)
    window.attachEvent("onload", loadIframe);
else window.onload = loadIframe;