var img = 'april-26-special-large-banner.png'
var dir = '/images/index/'

var now = new Date();
var start = new Date( 'April 26,2010 5:00 PM' );
var end =   new Date( 'April 29,2010 5:30 PM' );

if((now >= start) && (now <= end) ){
    document.write('<a id="overlayImage" href="' + dir + img + '" style="display:none;"><img src="' + dir + img + '"  alt="" /></a>');

    $(function() {
        $('#overlayImage').lightBox({fixedNavigation:true});
        $('#overlayImage').trigger('click');
    });
}