/**
 * @author Stephane
 */
// overwrite fOpen() function defined by 4Q
if (window.addEventListener) // Standard
    window.addEventListener('load', ga4qinit, false);
else 
    if (window.attachEvent) // IE
        window.attachEvent('onload', ga4qinit);

function ga4qinit(){
    var vL = document.getElementById("yOn");
	if(vL)
	    if (window.addEventListener) // Standard
	        vL.addEventListener('click', ga4q, false);
	    else 
	        if (window.attachEvent) // IE
	            vL.attachEvent('onclick', ga4q);
	//ga4q();
}

/*
 * When user accept 4Q survey, set a session cookie with 4Q survey id + GA visitor id
 * Caveat: dependency on pageTracker
 */
function ga4q(){
    if (typeof pageTracker === 'object') 
		if (m = document.cookie.match(/__utma=\d+.(\d+)/)) {
			pageTracker._setVar(sID + ':' + m[1]);
		}
}