Date difference javascript

I want to compare the date selected from datepicker and the current date. Though everything seemed right, i didn't get the correct output. The reason is the date from datepicker contains time as 00:00:00 where as the currentdate contains the proper time. Set the time as zero using setHours().

date1 = new Date();

date1.setHours(0,0,0,0);

Reference: 

http://stackoverflow.com/questions/2698725/

comparing-date-part-only-without-comparing-time-in-javascript