var id = '';
var cObj = null;

var responseSuccess = function(o) {
	document.getElementById(id).innerHTML = o.responseText;

	if ( "Microsoft Internet Explorer" == navigator.appName) {
		alphaBackgrounds();
		fnLoadPngs();
	}

	YAHOO.util.Connect.abort(cObj);
}
var responseFailure = function(o) {  }
var callback = {
    success:responseSuccess,
    failure:responseFailure
}

var HTTPReqHandler = function (url) {
    id = 'mainContent';
    cObj = YAHOO.util.Connect.asyncRequest('GET',url,callback,null);
}

var HTTPPOSTHandler = function (oForm) {
    id = 'newsletter_form';
    YAHOO.util.Connect.setForm(oForm);
    YAHOO.util.Connect.asyncRequest("post", 'scripts/signup.php', callback);
}