Ext.BLANK_IMAGE_URL = 'images/s.gif';

tx = {data:{}, ui: {}};

// work around for broken cross frame Dates in Safari
function fixDate(d){
        return d ? new Date(d.getTime()) : d;
}

function fixDateMember(o, name){
        if(o[name]){
                o[name] = new Date(o[name].getTime());
        }
}