Snippet to prevent IE from storing iFrames loaded after page load as being an additional entry in the browser history in Internet Explorer. (Also kills the "click" noise in IE6) - ported to jQuery from YUI Version: http://www.julienlecomte.net/blog/2007/1

gistfile1.js

function setIFrameSrc(iframe, src) {
    var el;
    iframe = $(iframe)
    if ($.browser.msie) {
        // Create a new hidden iframe.
        el = $(iframe).clone();
        $(el).css("position", "absolute");
        $(el).css("visibility", "hidden");
// keep the original iframe id unique!
        $(el).attr("id", "");
        // Listen for the onload event.
		$(el).bind("load", function(){
            // First, remove the event listener or the old iframe
            // we intend to discard will not be freed...
			$(this).unbind("load");
            // Show the iframe.
            $(this).css("position",  "");
            $(this).css("visibility", "");
            // Replace the old iframe with the new one.
            $(iframe).parent().replaceWith(this);
            // Reset the iframe id.
            $(this).attr("id", $(iframe.attr("id")));

        });
        // Set its src first...
        $(el).attr("src", src);
        // ...and then append it to the body of the document.
        $("body").append(el);
   }
   else 
   {
   	 iframe.src = src;
   }
}