Comparison BetweenTwo Dates

var startDate = "02/01/2013";

var endDate = "02/01/2012";

var stDate = startDate.split("/")

var enDate = endDate.split("/")

var stdate = stDate[1] //date

var stmnth = stDate[0]-1 //month

var stYr = stDate[2] //year

var endate = enDate[1] //date  

var enmnth = enDate[0]-1 //month

var enyr = enDate[2] //year

var strtDate = new Date();

var endDate = new Date();

strtDate.setFullYear(styr,stmnth,stdate);

endDate.setFullYear(enyr, enmnth, endate)

if(strtDate>endDate){

           alert("Start date is greater than end date.")

}