d.setFullYear( 2005 , 0 , 1 );
d.setHours( 0 , 0 , 0 , 0 );
dd=new Date();
dd.setHours( 0 , 0 , 0 , 0 );
alert(dd.getTime());
alert(d.getTime());
alert(dd.getTime()-d.getTime());
alert((dd.getTime()-d.getTime())/( 1000 * 60 * 60 * 24 ));

dd=new Date( 1175029200000 + 3600000 );
d=new Date( 1104530400000 );

function DaySpan(ANow,AThen)
{
     return(!(ANow instanceof Date) || !(AThen instanceof Date) ? NaN : (Math.abs(ANow.getTime()-AThen.getTime())+Math.abs(Math.abs(ANow.getTimezoneOffset())-Math.abs(AThen.getTimezoneOffset()))* 60 * 1000 )/( 1000 * 60 * 60 * 24 ));
}